Cardiology

Exercising to lose weight is not for every ‘body’

This first item comes from the “You’ve got to be kidding” section of LOTME’s supersecret topics-of-interest file.

Maya23K/Thinkstock

Investigators at the Shenzhen Institute of Advanced Technology of the Chinese Academy of Sciences and the University of Roehampton noticed that some people who enrolled in exercise programs to lose weight did just the opposite: they gained weight.

Being scientists, they decided to look at the effects of energy expenditure and how those effects varied among individuals. The likely culprit in this case, they determined, is something called compensatory mechanisms. One such mechanism involves eating more food because exercise stimulates appetite, and another might reduce energy expenditure on other components like resting metabolism so that the exercise is, in effect, less costly.

A look at the numbers shows how compensatory mechanisms worked in the study population of 1,750 adults. Among individuals with the highest BMI, 51% of the calories burned during activity translated into calories burned at the end of the day. For those with normal BMI, however, 72% of calories burned during activity were reflected in total expenditure.

“People living with obesity cut back their resting metabolism when they are more active. The result is that for every calorie they spend on exercise they save about half a calorie on resting,” the investigators explained.

In other words, some bodies will, unconsciously, work against the conscious effort of exercising to lose weight. Thank you very much, compensatory mechanisms, for the boundarylessness exhibited in exceeding your job description.
 

When it comes to the mix, walnuts go nuts

When it comes to mixed nuts, walnuts get no love. But we may be able to give you a reason to not pick them out: Your arteries.

PxHere

Participants in a recent study who ate about a half-cup of walnuts every day for 2 years saw a drop in their low-density lipoprotein (LDL) cholesterol. The number and quality of LDL particles in healthy older adults also improved. How? Good ol’ omega-3 fatty acids.

Omega-3 is found in many foods linked to lower risks of heart disease, lower cholesterol levels, and lower blood sugar levels, but the one thing that makes the walnut a front runner for Miss Super Food 2021 is their ability to improve the quality of LDL particles.

“LDL particles come in various sizes [and] research has shown that small, dense LDL particles are more often associated with atherosclerosis, the plaque or fatty deposits that build up in the arteries,” Emilio Ros, MD, PhD, of the Hospital Clínic of Barcelona and the study’s senior investigator, said in a written statement.

The 708 participants, aged 63-79 years and mostly women, were divided into two groups: One received the walnut diet and the other did not. After 2 years, the walnut group had lower LDL levels by an average of 4.3 mg/dL. Total cholesterol was reduced by an average of 8.5 mg/dL. Also, their total LDL particle count was 4.3% lower and small LDL particles were down by 6.1%.

So instead of picking the walnuts out of the mix, try to find it in your heart to appreciate them. Your body already does.
 

Begun, the clone war has

Well, not quite yet, Master Yoda, but perhaps one day soon, if a study from Japan into the uncanny valley of the usage of cloned humanlike faces in robotics and artificial intelligence, published in PLOS One, is to be believed.

Patrick Bursa/Pixabay

The study consisted of a number of six smaller experiments in which participants judged a series of images based on subjective eeriness, emotional valence, and realism. The images included people with the same cloned face; people with different faces; dogs; identical twins, triplets, quadruplets, etc.; and cloned animated characters. In the sixth experiment, the photos were the same as in the second (six cloned faces, six different faces, and a single face) but participants also answered the Disgust Scale–Revised to accurately analyze disgust sensitivity.

The results of all these experiments were quite clear: People found the cloned faces far creepier than the varied or single face, an effect the researchers called clone devaluation. Notably, this effect only applied to realistic human faces; most people didn’t find the cloned dogs or cloned animated characters creepy. However, those who did were more likely to find the human clones eerie on the Disgust Scale.

The authors noted that future robotics technology needs to be carefully considered to avoid the uncanny valley and this clone devaluation effect, which is a very good point. The last thing we need is a few million robots with identical faces getting angry at us and pulling a Terminator/Order 66 combo. We’re already in a viral apocalypse; we don’t need a robot one on top of that.
 

Congratulations to our new favorite reader

The winner of last week’s inaugural Pandemic Pandemonium comes to us from Tiffanie Roe. By getting her entry in first, just ahead of the flood of responses we received – and by flood we mean a very slow and very quickly repaired drip – Ms. Roe puts the gold medal for COVID-related insanity around the necks of Australian magpies, who may start attacking people wearing face masks during “swooping season” because the birds don’t recognize them.

Exercising to lose weight is not for every ‘body’

This first item comes from the “You’ve got to be kidding” section of LOTME’s supersecret topics-of-interest file.

Maya23K/Thinkstock

Investigators at the Shenzhen Institute of Advanced Technology of the Chinese Academy of Sciences and the University of Roehampton noticed that some people who enrolled in exercise programs to lose weight did just the opposite: they gained weight.

Being scientists, they decided to look at the effects of energy expenditure and how those effects varied among individuals. The likely culprit in this case, they determined, is something called compensatory mechanisms. One such mechanism involves eating more food because exercise stimulates appetite, and another might reduce energy expenditure on other components like resting metabolism so that the exercise is, in effect, less costly.

A look at the numbers shows how compensatory mechanisms worked in the study population of 1,750 adults. Among individuals with the highest BMI, 51% of the calories burned during activity translated into calories burned at the end of the day. For those with normal BMI, however, 72% of calories burned during activity were reflected in total expenditure.

“People living with obesity cut back their resting metabolism when they are more active. The result is that for every calorie they spend on exercise they save about half a calorie on resting,” the investigators explained.

In other words, some bodies will, unconsciously, work against the conscious effort of exercising to lose weight. Thank you very much, compensatory mechanisms, for the boundarylessness exhibited in exceeding your job description.
 

When it comes to the mix, walnuts go nuts

When it comes to mixed nuts, walnuts get no love. But we may be able to give you a reason to not pick them out: Your arteries.

PxHere

Participants in a recent study who ate about a half-cup of walnuts every day for 2 years saw a drop in their low-density lipoprotein (LDL) cholesterol. The number and quality of LDL particles in healthy older adults also improved. How? Good ol’ omega-3 fatty acids.

Omega-3 is found in many foods linked to lower risks of heart disease, lower cholesterol levels, and lower blood sugar levels, but the one thing that makes the walnut a front runner for Miss Super Food 2021 is their ability to improve the quality of LDL particles.

“LDL particles come in various sizes [and] research has shown that small, dense LDL particles are more often associated with atherosclerosis, the plaque or fatty deposits that build up in the arteries,” Emilio Ros, MD, PhD, of the Hospital Clínic of Barcelona and the study’s senior investigator, said in a written statement.

The 708 participants, aged 63-79 years and mostly women, were divided into two groups: One received the walnut diet and the other did not. After 2 years, the walnut group had lower LDL levels by an average of 4.3 mg/dL. Total cholesterol was reduced by an average of 8.5 mg/dL. Also, their total LDL particle count was 4.3% lower and small LDL particles were down by 6.1%.

So instead of picking the walnuts out of the mix, try to find it in your heart to appreciate them. Your body already does.
 

Begun, the clone war has

Well, not quite yet, Master Yoda, but perhaps one day soon, if a study from Japan into the uncanny valley of the usage of cloned humanlike faces in robotics and artificial intelligence, published in PLOS One, is to be believed.

Patrick Bursa/Pixabay

The study consisted of a number of six smaller experiments in which participants judged a series of images based on subjective eeriness, emotional valence, and realism. The images included people with the same cloned face; people with different faces; dogs; identical twins, triplets, quadruplets, etc.; and cloned animated characters. In the sixth experiment, the photos were the same as in the second (six cloned faces, six different faces, and a single face) but participants also answered the Disgust Scale–Revised to accurately analyze disgust sensitivity.

The results of all these experiments were quite clear: People found the cloned faces far creepier than the varied or single face, an effect the researchers called clone devaluation. Notably, this effect only applied to realistic human faces; most people didn’t find the cloned dogs or cloned animated characters creepy. However, those who did were more likely to find the human clones eerie on the Disgust Scale.

The authors noted that future robotics technology needs to be carefully considered to avoid the uncanny valley and this clone devaluation effect, which is a very good point. The last thing we need is a few million robots with identical faces getting angry at us and pulling a Terminator/Order 66 combo. We’re already in a viral apocalypse; we don’t need a robot one on top of that.
 

Congratulations to our new favorite reader

The winner of last week’s inaugural Pandemic Pandemonium comes to us from Tiffanie Roe. By getting her entry in first, just ahead of the flood of responses we received – and by flood we mean a very slow and very quickly repaired drip – Ms. Roe puts the gold medal for COVID-related insanity around the necks of Australian magpies, who may start attacking people wearing face masks during “swooping season” because the birds don’t recognize them.

Exercising to lose weight is not for every ‘body’

This first item comes from the “You’ve got to be kidding” section of LOTME’s supersecret topics-of-interest file.

Maya23K/Thinkstock

Investigators at the Shenzhen Institute of Advanced Technology of the Chinese Academy of Sciences and the University of Roehampton noticed that some people who enrolled in exercise programs to lose weight did just the opposite: they gained weight.

Being scientists, they decided to look at the effects of energy expenditure and how those effects varied among individuals. The likely culprit in this case, they determined, is something called compensatory mechanisms. One such mechanism involves eating more food because exercise stimulates appetite, and another might reduce energy expenditure on other components like resting metabolism so that the exercise is, in effect, less costly.

A look at the numbers shows how compensatory mechanisms worked in the study population of 1,750 adults. Among individuals with the highest BMI, 51% of the calories burned during activity translated into calories burned at the end of the day. For those with normal BMI, however, 72% of calories burned during activity were reflected in total expenditure.

“People living with obesity cut back their resting metabolism when they are more active. The result is that for every calorie they spend on exercise they save about half a calorie on resting,” the investigators explained.

In other words, some bodies will, unconsciously, work against the conscious effort of exercising to lose weight. Thank you very much, compensatory mechanisms, for the boundarylessness exhibited in exceeding your job description.
 

When it comes to the mix, walnuts go nuts

When it comes to mixed nuts, walnuts get no love. But we may be able to give you a reason to not pick them out: Your arteries.

PxHere

Participants in a recent study who ate about a half-cup of walnuts every day for 2 years saw a drop in their low-density lipoprotein (LDL) cholesterol. The number and quality of LDL particles in healthy older adults also improved. How? Good ol’ omega-3 fatty acids.

Omega-3 is found in many foods linked to lower risks of heart disease, lower cholesterol levels, and lower blood sugar levels, but the one thing that makes the walnut a front runner for Miss Super Food 2021 is their ability to improve the quality of LDL particles.

“LDL particles come in various sizes [and] research has shown that small, dense LDL particles are more often associated with atherosclerosis, the plaque or fatty deposits that build up in the arteries,” Emilio Ros, MD, PhD, of the Hospital Clínic of Barcelona and the study’s senior investigator, said in a written statement.

The 708 participants, aged 63-79 years and mostly women, were divided into two groups: One received the walnut diet and the other did not. After 2 years, the walnut group had lower LDL levels by an average of 4.3 mg/dL. Total cholesterol was reduced by an average of 8.5 mg/dL. Also, their total LDL particle count was 4.3% lower and small LDL particles were down by 6.1%.

So instead of picking the walnuts out of the mix, try to find it in your heart to appreciate them. Your body already does.
 

Begun, the clone war has

Well, not quite yet, Master Yoda, but perhaps one day soon, if a study from Japan into the uncanny valley of the usage of cloned humanlike faces in robotics and artificial intelligence, published in PLOS One, is to be believed.

Patrick Bursa/Pixabay

The study consisted of a number of six smaller experiments in which participants judged a series of images based on subjective eeriness, emotional valence, and realism. The images included people with the same cloned face; people with different faces; dogs; identical twins, triplets, quadruplets, etc.; and cloned animated characters. In the sixth experiment, the photos were the same as in the second (six cloned faces, six different faces, and a single face) but participants also answered the Disgust Scale–Revised to accurately analyze disgust sensitivity.

The results of all these experiments were quite clear: People found the cloned faces far creepier than the varied or single face, an effect the researchers called clone devaluation. Notably, this effect only applied to realistic human faces; most people didn’t find the cloned dogs or cloned animated characters creepy. However, those who did were more likely to find the human clones eerie on the Disgust Scale.

The authors noted that future robotics technology needs to be carefully considered to avoid the uncanny valley and this clone devaluation effect, which is a very good point. The last thing we need is a few million robots with identical faces getting angry at us and pulling a Terminator/Order 66 combo. We’re already in a viral apocalypse; we don’t need a robot one on top of that.
 

Congratulations to our new favorite reader

The winner of last week’s inaugural Pandemic Pandemonium comes to us from Tiffanie Roe. By getting her entry in first, just ahead of the flood of responses we received – and by flood we mean a very slow and very quickly repaired drip – Ms. Roe puts the gold medal for COVID-related insanity around the necks of Australian magpies, who may start attacking people wearing face masks during “swooping season” because the birds don’t recognize them.

Children who receive CPR with both rescue breathing and compressions from a bystander have greater odds of survival without serious brain damage than if they receive CPR with compressions only, according to a study published online in the Journal of the American College of Cardiology.

Specifically, a child has a 61% better chance of surviving with good neurologic outcomes if they receive compression-only CPR versus no bystander resuscitation, but that child is more than twice as likely to survive if he or she receives rescue breathing as well.

The study’s clinical implications are most important for bystander CPR training, lead author Maryam Y. Naim, MD, MSCE, of the Children’s Hospital of Philadelphia and the University of Pennsylvania, also in Philadelphia, told this news organization.

“Many programs teach compression-only CPR to lay rescuers, and there should be a renewed emphasis on rescue breathing for the possibility a lay rescuer has to perform CPR on a child,” Dr. Naim said.

That said, if a bystander is unfamiliar with how to properly administer rescue breathing or has concerns about hygiene or infection on someone they don’t know, Dr. Naim advises doing compression-only CPR, especially if the child is older than age 1 year. “If a child is younger than a year of age please consider giving rescue breaths with chest compressions,” she added.

Dr. Naim and colleagues analyzed 13,060 pediatric out-of-hospital cardiac arrests from the Cardiac Arrest Registry to Enhance Survival database, which includes data from 911 call centers, emergency medical services (EMS) providers, and receiving hospitals across 28 states. The data sample included all cases age 18 years or younger who experienced nontraumatic out-of-hospital cardiac arrest between January 2013 and December 2019, excluding those with obvious signs of death or a “do not resuscitate” order.

“Because the etiology of cardiac arrest in children is difficult to determine, especially in cases that result in death, all nontraumatic cases were included regardless of presumed etiology, including respiratory, cardiac, drowning, electrocution, or other,” the authors wrote. The researchers defined neurologically favorable survival, the primary endpoint, as “a cerebral performance category score of 1 (no neurologic disability) or 2 (moderate disability)” at discharge. Neurologically unfavorable survival included a score of 3 (severe disability), 4 (coma or vegetative state), or death. 

Among the 10,429 cases ultimately analyzed after exclusions and missing data, 46.5% received bystander CPR. Slightly more than half of these (55.6%) received compression-only CPR while the other 45.3% received rescue-breathing CPR.

Dr. Naim was surprised that compression-only CPR was the most common form of CPR given to children with cardiac arrest because the current American Heart Association/International Liaison Committee on Resuscitation recommendations note rescue breathing as the preferred form in children.

That preference exists because respiratory failure occurs more often in children than in adults as a cause of cardiac arrest, explained Sandra Weiss, MD, an interventional cardiologist and the medical director of the cardiac intensive care unit at ChristianaCare’s Christiana Hospital in Newark, Del.

Because of that, “it’s not surprising that if you give respiratory resuscitation to a child who’s arresting from a respiratory cause that they’re going to do better than if you just do chest compressions,” said Dr. Weiss, who was not involved in the study.

The study found the most common presumed cause of arrest to be cardiac, occurring in 44.4% of cases, but it was closely followed by respiratory in nearly one-third of cases (32.8%).

Infants younger than age 1 year were the most common age group to have a cardiac arrest, making up more than all other ages combined. Most out-of-hospital cardiac arrests occurred in a home and were observed by someone when they happened. While rates of bystander CPR did not change during the study’s 6-year period, the incidence of compression-only CPR increased. Lay people without medical training provided the CPR in 93.6% of cases.

Only 8.6% of cardiac arrest cases resulted in neurologically favorable survival, a rate which remained steady throughout the study period. The rate increased with increasing age, at 4.6% of infants, 10.6% of children, and 16.5% of adolescents.

Those who received CPR with rescue breathing had more than double the odds of neurologically favorable survival than if they hadn’t received CPR at all (adjusted odds ratio, 2.16). Survival with a positive neurologic outcome was 1.6 times more likely with compression-only CPR than no CPR (aOR, 1.61). When researchers compared the two forms of CPR, inclusion of rescue breathing increased the child’s likelihood of survival without neurologic sequelae by 36% (aOR, 1.36).

Despite these findings, however, Dr. Weiss agrees with Dr. Naim that offering compression-only CPR is preferable to offering no CPR at all.

“All resuscitation is better than no resuscitation, regardless of whether it’s compression only or respiratory breathing,” Dr. Weiss said in an interview. “The average lay person is probably going to do the easiest thing, and survivability is going to be increased by doing anything rather than nothing.”

Dr. Weiss also noted that it’s easier to instruct people how to do chest compressions, especially, for example, during an emergency phone call with a dispatcher while waiting for EMS to arrive.

“It’s absolutely imperative for people to get the basics, and the basics are compressions,” she said. “That’s really what is the most vital component of all resuscitative efforts, regardless of whether it’s adult or pediatrics.”

Dr. Weiss also acknowledges that laypeople may feel particularly less comfortable administering rescue breaths to a child they don’t know in the midst of the COVID-19 pandemic. Even if the odds are low that the specific child experiencing a cardiac arrest is necessarily infectious, the AHA guidelines include the caveat that, “if there’s a concern for infection transmissibility, that compression only is acceptable,” Dr. Weiss said. “It’s a reality for our current state.”

The superiority of rescue-breathing CPR to compression-only CPR was true across all age groups, but compression-only CPR still resulted in better survival odds than no CPR at all for all age groups except infants, in whom only rescue breathing was associated with a statistically significant increased likelihood of neurologically favorable survival.

Protective factors for positive outcomes included being younger than age 1 year, the arrest being witnessed, and a having shockable rhythm. Risk factors reducing survival included being Black, being in a home, and cardiac arrests linked with automated external defibrillator use before EMS arrived.

The CARES program was previously funded by the Centers for Disease Control and Prevention and is now funded by the American Red Cross, the AHA, Stryker, and Emory University. Dr. Naim was further supported by Children’s Hospital of Philadelphia and the American Red Cross. The authors and Dr. Weiss disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Children who receive CPR with both rescue breathing and compressions from a bystander have greater odds of survival without serious brain damage than if they receive CPR with compressions only, according to a study published online in the Journal of the American College of Cardiology.

Specifically, a child has a 61% better chance of surviving with good neurologic outcomes if they receive compression-only CPR versus no bystander resuscitation, but that child is more than twice as likely to survive if he or she receives rescue breathing as well.

The study’s clinical implications are most important for bystander CPR training, lead author Maryam Y. Naim, MD, MSCE, of the Children’s Hospital of Philadelphia and the University of Pennsylvania, also in Philadelphia, told this news organization.

“Many programs teach compression-only CPR to lay rescuers, and there should be a renewed emphasis on rescue breathing for the possibility a lay rescuer has to perform CPR on a child,” Dr. Naim said.

That said, if a bystander is unfamiliar with how to properly administer rescue breathing or has concerns about hygiene or infection on someone they don’t know, Dr. Naim advises doing compression-only CPR, especially if the child is older than age 1 year. “If a child is younger than a year of age please consider giving rescue breaths with chest compressions,” she added.

Dr. Naim and colleagues analyzed 13,060 pediatric out-of-hospital cardiac arrests from the Cardiac Arrest Registry to Enhance Survival database, which includes data from 911 call centers, emergency medical services (EMS) providers, and receiving hospitals across 28 states. The data sample included all cases age 18 years or younger who experienced nontraumatic out-of-hospital cardiac arrest between January 2013 and December 2019, excluding those with obvious signs of death or a “do not resuscitate” order.

“Because the etiology of cardiac arrest in children is difficult to determine, especially in cases that result in death, all nontraumatic cases were included regardless of presumed etiology, including respiratory, cardiac, drowning, electrocution, or other,” the authors wrote. The researchers defined neurologically favorable survival, the primary endpoint, as “a cerebral performance category score of 1 (no neurologic disability) or 2 (moderate disability)” at discharge. Neurologically unfavorable survival included a score of 3 (severe disability), 4 (coma or vegetative state), or death. 

Among the 10,429 cases ultimately analyzed after exclusions and missing data, 46.5% received bystander CPR. Slightly more than half of these (55.6%) received compression-only CPR while the other 45.3% received rescue-breathing CPR.

Dr. Naim was surprised that compression-only CPR was the most common form of CPR given to children with cardiac arrest because the current American Heart Association/International Liaison Committee on Resuscitation recommendations note rescue breathing as the preferred form in children.

That preference exists because respiratory failure occurs more often in children than in adults as a cause of cardiac arrest, explained Sandra Weiss, MD, an interventional cardiologist and the medical director of the cardiac intensive care unit at ChristianaCare’s Christiana Hospital in Newark, Del.

Because of that, “it’s not surprising that if you give respiratory resuscitation to a child who’s arresting from a respiratory cause that they’re going to do better than if you just do chest compressions,” said Dr. Weiss, who was not involved in the study.

The study found the most common presumed cause of arrest to be cardiac, occurring in 44.4% of cases, but it was closely followed by respiratory in nearly one-third of cases (32.8%).

Infants younger than age 1 year were the most common age group to have a cardiac arrest, making up more than all other ages combined. Most out-of-hospital cardiac arrests occurred in a home and were observed by someone when they happened. While rates of bystander CPR did not change during the study’s 6-year period, the incidence of compression-only CPR increased. Lay people without medical training provided the CPR in 93.6% of cases.

Only 8.6% of cardiac arrest cases resulted in neurologically favorable survival, a rate which remained steady throughout the study period. The rate increased with increasing age, at 4.6% of infants, 10.6% of children, and 16.5% of adolescents.

Those who received CPR with rescue breathing had more than double the odds of neurologically favorable survival than if they hadn’t received CPR at all (adjusted odds ratio, 2.16). Survival with a positive neurologic outcome was 1.6 times more likely with compression-only CPR than no CPR (aOR, 1.61). When researchers compared the two forms of CPR, inclusion of rescue breathing increased the child’s likelihood of survival without neurologic sequelae by 36% (aOR, 1.36).

Despite these findings, however, Dr. Weiss agrees with Dr. Naim that offering compression-only CPR is preferable to offering no CPR at all.

“All resuscitation is better than no resuscitation, regardless of whether it’s compression only or respiratory breathing,” Dr. Weiss said in an interview. “The average lay person is probably going to do the easiest thing, and survivability is going to be increased by doing anything rather than nothing.”

Dr. Weiss also noted that it’s easier to instruct people how to do chest compressions, especially, for example, during an emergency phone call with a dispatcher while waiting for EMS to arrive.

“It’s absolutely imperative for people to get the basics, and the basics are compressions,” she said. “That’s really what is the most vital component of all resuscitative efforts, regardless of whether it’s adult or pediatrics.”

Dr. Weiss also acknowledges that laypeople may feel particularly less comfortable administering rescue breaths to a child they don’t know in the midst of the COVID-19 pandemic. Even if the odds are low that the specific child experiencing a cardiac arrest is necessarily infectious, the AHA guidelines include the caveat that, “if there’s a concern for infection transmissibility, that compression only is acceptable,” Dr. Weiss said. “It’s a reality for our current state.”

The superiority of rescue-breathing CPR to compression-only CPR was true across all age groups, but compression-only CPR still resulted in better survival odds than no CPR at all for all age groups except infants, in whom only rescue breathing was associated with a statistically significant increased likelihood of neurologically favorable survival.

Protective factors for positive outcomes included being younger than age 1 year, the arrest being witnessed, and a having shockable rhythm. Risk factors reducing survival included being Black, being in a home, and cardiac arrests linked with automated external defibrillator use before EMS arrived.

The CARES program was previously funded by the Centers for Disease Control and Prevention and is now funded by the American Red Cross, the AHA, Stryker, and Emory University. Dr. Naim was further supported by Children’s Hospital of Philadelphia and the American Red Cross. The authors and Dr. Weiss disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Children who receive CPR with both rescue breathing and compressions from a bystander have greater odds of survival without serious brain damage than if they receive CPR with compressions only, according to a study published online in the Journal of the American College of Cardiology.

Specifically, a child has a 61% better chance of surviving with good neurologic outcomes if they receive compression-only CPR versus no bystander resuscitation, but that child is more than twice as likely to survive if he or she receives rescue breathing as well.

The study’s clinical implications are most important for bystander CPR training, lead author Maryam Y. Naim, MD, MSCE, of the Children’s Hospital of Philadelphia and the University of Pennsylvania, also in Philadelphia, told this news organization.

“Many programs teach compression-only CPR to lay rescuers, and there should be a renewed emphasis on rescue breathing for the possibility a lay rescuer has to perform CPR on a child,” Dr. Naim said.

That said, if a bystander is unfamiliar with how to properly administer rescue breathing or has concerns about hygiene or infection on someone they don’t know, Dr. Naim advises doing compression-only CPR, especially if the child is older than age 1 year. “If a child is younger than a year of age please consider giving rescue breaths with chest compressions,” she added.

Dr. Naim and colleagues analyzed 13,060 pediatric out-of-hospital cardiac arrests from the Cardiac Arrest Registry to Enhance Survival database, which includes data from 911 call centers, emergency medical services (EMS) providers, and receiving hospitals across 28 states. The data sample included all cases age 18 years or younger who experienced nontraumatic out-of-hospital cardiac arrest between January 2013 and December 2019, excluding those with obvious signs of death or a “do not resuscitate” order.

“Because the etiology of cardiac arrest in children is difficult to determine, especially in cases that result in death, all nontraumatic cases were included regardless of presumed etiology, including respiratory, cardiac, drowning, electrocution, or other,” the authors wrote. The researchers defined neurologically favorable survival, the primary endpoint, as “a cerebral performance category score of 1 (no neurologic disability) or 2 (moderate disability)” at discharge. Neurologically unfavorable survival included a score of 3 (severe disability), 4 (coma or vegetative state), or death. 

Among the 10,429 cases ultimately analyzed after exclusions and missing data, 46.5% received bystander CPR. Slightly more than half of these (55.6%) received compression-only CPR while the other 45.3% received rescue-breathing CPR.

Dr. Naim was surprised that compression-only CPR was the most common form of CPR given to children with cardiac arrest because the current American Heart Association/International Liaison Committee on Resuscitation recommendations note rescue breathing as the preferred form in children.

That preference exists because respiratory failure occurs more often in children than in adults as a cause of cardiac arrest, explained Sandra Weiss, MD, an interventional cardiologist and the medical director of the cardiac intensive care unit at ChristianaCare’s Christiana Hospital in Newark, Del.

Because of that, “it’s not surprising that if you give respiratory resuscitation to a child who’s arresting from a respiratory cause that they’re going to do better than if you just do chest compressions,” said Dr. Weiss, who was not involved in the study.

The study found the most common presumed cause of arrest to be cardiac, occurring in 44.4% of cases, but it was closely followed by respiratory in nearly one-third of cases (32.8%).

Infants younger than age 1 year were the most common age group to have a cardiac arrest, making up more than all other ages combined. Most out-of-hospital cardiac arrests occurred in a home and were observed by someone when they happened. While rates of bystander CPR did not change during the study’s 6-year period, the incidence of compression-only CPR increased. Lay people without medical training provided the CPR in 93.6% of cases.

Only 8.6% of cardiac arrest cases resulted in neurologically favorable survival, a rate which remained steady throughout the study period. The rate increased with increasing age, at 4.6% of infants, 10.6% of children, and 16.5% of adolescents.

Those who received CPR with rescue breathing had more than double the odds of neurologically favorable survival than if they hadn’t received CPR at all (adjusted odds ratio, 2.16). Survival with a positive neurologic outcome was 1.6 times more likely with compression-only CPR than no CPR (aOR, 1.61). When researchers compared the two forms of CPR, inclusion of rescue breathing increased the child’s likelihood of survival without neurologic sequelae by 36% (aOR, 1.36).

Despite these findings, however, Dr. Weiss agrees with Dr. Naim that offering compression-only CPR is preferable to offering no CPR at all.

“All resuscitation is better than no resuscitation, regardless of whether it’s compression only or respiratory breathing,” Dr. Weiss said in an interview. “The average lay person is probably going to do the easiest thing, and survivability is going to be increased by doing anything rather than nothing.”

Dr. Weiss also noted that it’s easier to instruct people how to do chest compressions, especially, for example, during an emergency phone call with a dispatcher while waiting for EMS to arrive.

“It’s absolutely imperative for people to get the basics, and the basics are compressions,” she said. “That’s really what is the most vital component of all resuscitative efforts, regardless of whether it’s adult or pediatrics.”

Dr. Weiss also acknowledges that laypeople may feel particularly less comfortable administering rescue breaths to a child they don’t know in the midst of the COVID-19 pandemic. Even if the odds are low that the specific child experiencing a cardiac arrest is necessarily infectious, the AHA guidelines include the caveat that, “if there’s a concern for infection transmissibility, that compression only is acceptable,” Dr. Weiss said. “It’s a reality for our current state.”

The superiority of rescue-breathing CPR to compression-only CPR was true across all age groups, but compression-only CPR still resulted in better survival odds than no CPR at all for all age groups except infants, in whom only rescue breathing was associated with a statistically significant increased likelihood of neurologically favorable survival.

Protective factors for positive outcomes included being younger than age 1 year, the arrest being witnessed, and a having shockable rhythm. Risk factors reducing survival included being Black, being in a home, and cardiac arrests linked with automated external defibrillator use before EMS arrived.

The CARES program was previously funded by the Centers for Disease Control and Prevention and is now funded by the American Red Cross, the AHA, Stryker, and Emory University. Dr. Naim was further supported by Children’s Hospital of Philadelphia and the American Red Cross. The authors and Dr. Weiss disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The anti-inflammatory agents colchicine and icosapent ethyl (Vascepa; Amarin) failed to provide substantial benefits in separate randomized COVID-19 trials.

Both were reported at the European Society of Cardiology (ESC) Congress 2021.

The open-label ECLA PHRI COLCOVID trial randomized 1,277 hospitalized adults (mean age 62 years) to usual care alone or with colchicine at a loading dose of 1.5 mg for 2 hours followed by 0.5 mg on day 1 and then 0.5 mg twice daily for 14 days or until discharge.

The investigators hypothesized that colchicine, which is widely used to treat gout and other inflammatory conditions, might modulate the hyperinflammatory syndrome, or cytokine storm, associated with COVID-19.

Results showed that the need for mechanical ventilation or death occurred in 25.0% of patients receiving colchicine and 28.8% with usual care (P = .08).

The coprimary endpoint of death at 28 days was also not significantly different between groups (20.5% vs. 22.2%), principal investigator Rafael Diaz, MD, said in a late-breaking COVID-19 trials session at the congress.

Among the secondary outcomes at 28 days, colchicine significantly reduced the incidence of new intubation or death from respiratory failure from 27.0% to 22.3% (hazard ratio, 0.79; 95% confidence interval, 0.63-0.99) but not mortality from respiratory failure (19.5% vs. 16.8%).

The only important adverse effect was severe diarrhea, which was reported in 11.3% of the colchicine group vs. 4.5% in the control group, said Dr. Diaz, director of Estudios Clínicos Latinoamérica (ECLA), Rosario, Argentina.

The results are consistent with those from the massive RECOVERY trial, which earlier this year stopped enrollment in the colchicine arm for lack of efficacy in patients hospitalized with COVID-19, and COLCORONA, which missed its primary endpoint using colchicine among nonhospitalized adults with COVID-19.

Session chair and COLCORONA principal investigator Jean-Claude Tardif, MD, pointed out that, as clinicians, it’s fairly uncommon to combine systemic steroids with colchicine, which was the case in 92% of patients in ECLA PHRI COLCOVID.

“I think it is an inherent limitation of testing colchicine on top of steroids,” said Dr. Tardif, of the Montreal Heart Institute.
 

Icosapent ethyl in PREPARE-IT

Dr. Diaz returned in the ESC session to present the results of the PREPARE-IT trial, which tested whether icosapent ethyl – at a loading dose of 8 grams (4 capsules) for the first 3 days and 4 g/d on days 4-60 – could reduce the risk for SARS-CoV-2 infection in 2,041 health care and other public workers in Argentina at high risk for infection (mean age 40.5 years).

Vascepa was approved by the Food and Drug Administration in 2012 for the reduction of elevated triglyceride levels, with an added indication in 2019 to reduce cardiovascular (CV) events in people with elevated triglycerides and established CV disease or diabetes with other CV risk factors.

The rationale for using the high-dose prescription eicosapentaenoic acid (EPA) preparation includes its anti-inflammatory and antithrombotic effects, and that unsaturated fatty acids, especially EPA, might inactivate the enveloped virus, he explained.

Among 1,712 participants followed for up to 60 days, however, the SARS-CoV-2 infection rate was 7.9% with icosapent ethyl vs. 7.1% with a mineral oil placebo (P = .58).

There were also no significant changes from baseline in the icosapent ethyl and placebo groups for the secondary outcomes of high-sensitivity C-reactive protein (0 vs. 0), triglycerides (median –2 mg/dL vs. 7 mg/dL), or Influenza Patient-Reported Outcome (FLU-PRO) questionnaire scores (median 0.01 vs. 0.03).

The use of a mineral oil placebo has been the subject of controversy in previous fish oil trials, but, Dr. Diaz noted, it did not have a significant proinflammatory effect or cause any excess adverse events.

Overall, adverse events were similar between the active and placebo groups, including atrial fibrillation (none), major bleeding (none), minor bleeding (7 events vs. 10 events), gastrointestinal symptoms (6.8% vs. 7.0%), and diarrhea (8.6% vs. 7.7%).

Although it missed the primary endpoint, Dr. Diaz said, “this is the first large, randomized blinded trial to demonstrate excellent safety and tolerability of an 8-gram-per-day loading dose of icosapent ethyl, opening up the potential for acute use in randomized trials of myocardial infarction, acute coronary syndromes, strokes, and revascularization.”

During a discussion of the results, Dr. Diaz said the Delta variant was not present at the time of the analysis and that the second half of the trial will report on whether icosapent ethyl can reduce the risk for hospitalization or death in participants diagnosed with COVID-19.

ECLA PHRI COLCOVID was supported by the Estudios Clínicos Latinoamérica Population Health Research Institute. PREPARE-IT was supported by Estudios Clínicos Latinoamérica with collaboration from Amarin. Dr. Diaz reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The anti-inflammatory agents colchicine and icosapent ethyl (Vascepa; Amarin) failed to provide substantial benefits in separate randomized COVID-19 trials.

Both were reported at the European Society of Cardiology (ESC) Congress 2021.

The open-label ECLA PHRI COLCOVID trial randomized 1,277 hospitalized adults (mean age 62 years) to usual care alone or with colchicine at a loading dose of 1.5 mg for 2 hours followed by 0.5 mg on day 1 and then 0.5 mg twice daily for 14 days or until discharge.

The investigators hypothesized that colchicine, which is widely used to treat gout and other inflammatory conditions, might modulate the hyperinflammatory syndrome, or cytokine storm, associated with COVID-19.

Results showed that the need for mechanical ventilation or death occurred in 25.0% of patients receiving colchicine and 28.8% with usual care (P = .08).

The coprimary endpoint of death at 28 days was also not significantly different between groups (20.5% vs. 22.2%), principal investigator Rafael Diaz, MD, said in a late-breaking COVID-19 trials session at the congress.

Among the secondary outcomes at 28 days, colchicine significantly reduced the incidence of new intubation or death from respiratory failure from 27.0% to 22.3% (hazard ratio, 0.79; 95% confidence interval, 0.63-0.99) but not mortality from respiratory failure (19.5% vs. 16.8%).

The only important adverse effect was severe diarrhea, which was reported in 11.3% of the colchicine group vs. 4.5% in the control group, said Dr. Diaz, director of Estudios Clínicos Latinoamérica (ECLA), Rosario, Argentina.

The results are consistent with those from the massive RECOVERY trial, which earlier this year stopped enrollment in the colchicine arm for lack of efficacy in patients hospitalized with COVID-19, and COLCORONA, which missed its primary endpoint using colchicine among nonhospitalized adults with COVID-19.

Session chair and COLCORONA principal investigator Jean-Claude Tardif, MD, pointed out that, as clinicians, it’s fairly uncommon to combine systemic steroids with colchicine, which was the case in 92% of patients in ECLA PHRI COLCOVID.

“I think it is an inherent limitation of testing colchicine on top of steroids,” said Dr. Tardif, of the Montreal Heart Institute.
 

Icosapent ethyl in PREPARE-IT

Dr. Diaz returned in the ESC session to present the results of the PREPARE-IT trial, which tested whether icosapent ethyl – at a loading dose of 8 grams (4 capsules) for the first 3 days and 4 g/d on days 4-60 – could reduce the risk for SARS-CoV-2 infection in 2,041 health care and other public workers in Argentina at high risk for infection (mean age 40.5 years).

Vascepa was approved by the Food and Drug Administration in 2012 for the reduction of elevated triglyceride levels, with an added indication in 2019 to reduce cardiovascular (CV) events in people with elevated triglycerides and established CV disease or diabetes with other CV risk factors.

The rationale for using the high-dose prescription eicosapentaenoic acid (EPA) preparation includes its anti-inflammatory and antithrombotic effects, and that unsaturated fatty acids, especially EPA, might inactivate the enveloped virus, he explained.

Among 1,712 participants followed for up to 60 days, however, the SARS-CoV-2 infection rate was 7.9% with icosapent ethyl vs. 7.1% with a mineral oil placebo (P = .58).

There were also no significant changes from baseline in the icosapent ethyl and placebo groups for the secondary outcomes of high-sensitivity C-reactive protein (0 vs. 0), triglycerides (median –2 mg/dL vs. 7 mg/dL), or Influenza Patient-Reported Outcome (FLU-PRO) questionnaire scores (median 0.01 vs. 0.03).

The use of a mineral oil placebo has been the subject of controversy in previous fish oil trials, but, Dr. Diaz noted, it did not have a significant proinflammatory effect or cause any excess adverse events.

Overall, adverse events were similar between the active and placebo groups, including atrial fibrillation (none), major bleeding (none), minor bleeding (7 events vs. 10 events), gastrointestinal symptoms (6.8% vs. 7.0%), and diarrhea (8.6% vs. 7.7%).

Although it missed the primary endpoint, Dr. Diaz said, “this is the first large, randomized blinded trial to demonstrate excellent safety and tolerability of an 8-gram-per-day loading dose of icosapent ethyl, opening up the potential for acute use in randomized trials of myocardial infarction, acute coronary syndromes, strokes, and revascularization.”

During a discussion of the results, Dr. Diaz said the Delta variant was not present at the time of the analysis and that the second half of the trial will report on whether icosapent ethyl can reduce the risk for hospitalization or death in participants diagnosed with COVID-19.

ECLA PHRI COLCOVID was supported by the Estudios Clínicos Latinoamérica Population Health Research Institute. PREPARE-IT was supported by Estudios Clínicos Latinoamérica with collaboration from Amarin. Dr. Diaz reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The anti-inflammatory agents colchicine and icosapent ethyl (Vascepa; Amarin) failed to provide substantial benefits in separate randomized COVID-19 trials.

Both were reported at the European Society of Cardiology (ESC) Congress 2021.

The open-label ECLA PHRI COLCOVID trial randomized 1,277 hospitalized adults (mean age 62 years) to usual care alone or with colchicine at a loading dose of 1.5 mg for 2 hours followed by 0.5 mg on day 1 and then 0.5 mg twice daily for 14 days or until discharge.

The investigators hypothesized that colchicine, which is widely used to treat gout and other inflammatory conditions, might modulate the hyperinflammatory syndrome, or cytokine storm, associated with COVID-19.

Results showed that the need for mechanical ventilation or death occurred in 25.0% of patients receiving colchicine and 28.8% with usual care (P = .08).

The coprimary endpoint of death at 28 days was also not significantly different between groups (20.5% vs. 22.2%), principal investigator Rafael Diaz, MD, said in a late-breaking COVID-19 trials session at the congress.

Among the secondary outcomes at 28 days, colchicine significantly reduced the incidence of new intubation or death from respiratory failure from 27.0% to 22.3% (hazard ratio, 0.79; 95% confidence interval, 0.63-0.99) but not mortality from respiratory failure (19.5% vs. 16.8%).

The only important adverse effect was severe diarrhea, which was reported in 11.3% of the colchicine group vs. 4.5% in the control group, said Dr. Diaz, director of Estudios Clínicos Latinoamérica (ECLA), Rosario, Argentina.

The results are consistent with those from the massive RECOVERY trial, which earlier this year stopped enrollment in the colchicine arm for lack of efficacy in patients hospitalized with COVID-19, and COLCORONA, which missed its primary endpoint using colchicine among nonhospitalized adults with COVID-19.

Session chair and COLCORONA principal investigator Jean-Claude Tardif, MD, pointed out that, as clinicians, it’s fairly uncommon to combine systemic steroids with colchicine, which was the case in 92% of patients in ECLA PHRI COLCOVID.

“I think it is an inherent limitation of testing colchicine on top of steroids,” said Dr. Tardif, of the Montreal Heart Institute.
 

Icosapent ethyl in PREPARE-IT

Dr. Diaz returned in the ESC session to present the results of the PREPARE-IT trial, which tested whether icosapent ethyl – at a loading dose of 8 grams (4 capsules) for the first 3 days and 4 g/d on days 4-60 – could reduce the risk for SARS-CoV-2 infection in 2,041 health care and other public workers in Argentina at high risk for infection (mean age 40.5 years).

Vascepa was approved by the Food and Drug Administration in 2012 for the reduction of elevated triglyceride levels, with an added indication in 2019 to reduce cardiovascular (CV) events in people with elevated triglycerides and established CV disease or diabetes with other CV risk factors.

The rationale for using the high-dose prescription eicosapentaenoic acid (EPA) preparation includes its anti-inflammatory and antithrombotic effects, and that unsaturated fatty acids, especially EPA, might inactivate the enveloped virus, he explained.

Among 1,712 participants followed for up to 60 days, however, the SARS-CoV-2 infection rate was 7.9% with icosapent ethyl vs. 7.1% with a mineral oil placebo (P = .58).

There were also no significant changes from baseline in the icosapent ethyl and placebo groups for the secondary outcomes of high-sensitivity C-reactive protein (0 vs. 0), triglycerides (median –2 mg/dL vs. 7 mg/dL), or Influenza Patient-Reported Outcome (FLU-PRO) questionnaire scores (median 0.01 vs. 0.03).

The use of a mineral oil placebo has been the subject of controversy in previous fish oil trials, but, Dr. Diaz noted, it did not have a significant proinflammatory effect or cause any excess adverse events.

Overall, adverse events were similar between the active and placebo groups, including atrial fibrillation (none), major bleeding (none), minor bleeding (7 events vs. 10 events), gastrointestinal symptoms (6.8% vs. 7.0%), and diarrhea (8.6% vs. 7.7%).

Although it missed the primary endpoint, Dr. Diaz said, “this is the first large, randomized blinded trial to demonstrate excellent safety and tolerability of an 8-gram-per-day loading dose of icosapent ethyl, opening up the potential for acute use in randomized trials of myocardial infarction, acute coronary syndromes, strokes, and revascularization.”

During a discussion of the results, Dr. Diaz said the Delta variant was not present at the time of the analysis and that the second half of the trial will report on whether icosapent ethyl can reduce the risk for hospitalization or death in participants diagnosed with COVID-19.

ECLA PHRI COLCOVID was supported by the Estudios Clínicos Latinoamérica Population Health Research Institute. PREPARE-IT was supported by Estudios Clínicos Latinoamérica with collaboration from Amarin. Dr. Diaz reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Not sure if you’ve heard the news, but eating a single hot dog will apparently cost you 36 minutes of healthy life. My first thought when hearing this was of course the same as everyone else’s: Poor Joey Chestnut, multiyear winner of Nathan’s annual hot dog–eating contest.

He won this year’s contest with 76 hot dogs, which puts his total number of competition-consumed hot dogs at 1,089 – which cost him, it would seem, 27.2 days of healthy life. Unless, of course, every hot dog he inhaled came with a bun hosting two portions of sesame seeds, which in turn would buy him 50 extra minutes of life (25 minutes per portion, you see) and would consequently have extended his life by 10.6 days.

Clearly, the obvious solution here is to ensure that all hot dog buns have two portions of sesame seeds on them moving forward; that way, hot dogs can transition from being poisonous killers to antiaging medicine.

The other solution, albeit less exciting, perhaps, is for researchers to stop studying single foods’ impacts on health, and/or for journals to stop publishing them, and/or for the media to stop promoting them – because they are all as ridiculously useless as the example above highlighting findings from a newly published study in Nature Food, entitled “Small targeted dietary changes can yield substantial gains for human health and the environment.”

While no doubt we would all love for diet and health to be so well understood that we could choose specific single foods (knowing that they would prolong our lives) while avoiding single foods that would shorten it, there’s this unfortunate truth that the degree of confounding among food alone is staggering. People eat thousands of different foods in thousands of different dietary combinations. Moreover, most (all?) research conducted on dietary impacts of single foods on health don’t actually track consumption of those specific foods over time, let alone their interactions with all other foods consumed, but rather at moments in time.

In the case of the “hot dogs will kill you unless there are sesame seeds on your bun” article, for example, the researchers utilized one solitary dietary recall session upon which to base their ridiculously specific, ridiculous conclusions.

People’s diets also change over time for various reasons, and of course people themselves are very different. You might imagine that people whose diets are rich in chicken wings, sugared soda, and hot dogs will have markedly different lifestyles and demographics than those whose diets are rich in walnuts, sashimi, and avocados.

So why do we keep seeing studies like this being published? Is it because they’re basically clickbait catnip for journals and newspapers, and in our publish-or-perish attention-seeking world, that means they not only get a pass but they get a press release? Is it because peer review is broken and everyone knows it? Is it because as a society, we’re frogs who have been steeping for decades in the ever-heated pot of nutritional nonsense, and consequently don’t think to question it?

I don’t know the answer to any of those questions, but one thing I do know: Studies on single foods’ impact on life length are pointless, impossible, and idiotic, and people who share them noncritically should be forever shunned – or at the very least, forever ignored.

Yoni Freedhoff, MD, is an associate professor of family medicine at the University of Ottawa and medical director of the Bariatric Medical Institute, a nonsurgical weight-management center.

A version of this article first appeared on Medscape.com.

Not sure if you’ve heard the news, but eating a single hot dog will apparently cost you 36 minutes of healthy life. My first thought when hearing this was of course the same as everyone else’s: Poor Joey Chestnut, multiyear winner of Nathan’s annual hot dog–eating contest.

He won this year’s contest with 76 hot dogs, which puts his total number of competition-consumed hot dogs at 1,089 – which cost him, it would seem, 27.2 days of healthy life. Unless, of course, every hot dog he inhaled came with a bun hosting two portions of sesame seeds, which in turn would buy him 50 extra minutes of life (25 minutes per portion, you see) and would consequently have extended his life by 10.6 days.

Clearly, the obvious solution here is to ensure that all hot dog buns have two portions of sesame seeds on them moving forward; that way, hot dogs can transition from being poisonous killers to antiaging medicine.

The other solution, albeit less exciting, perhaps, is for researchers to stop studying single foods’ impacts on health, and/or for journals to stop publishing them, and/or for the media to stop promoting them – because they are all as ridiculously useless as the example above highlighting findings from a newly published study in Nature Food, entitled “Small targeted dietary changes can yield substantial gains for human health and the environment.”

While no doubt we would all love for diet and health to be so well understood that we could choose specific single foods (knowing that they would prolong our lives) while avoiding single foods that would shorten it, there’s this unfortunate truth that the degree of confounding among food alone is staggering. People eat thousands of different foods in thousands of different dietary combinations. Moreover, most (all?) research conducted on dietary impacts of single foods on health don’t actually track consumption of those specific foods over time, let alone their interactions with all other foods consumed, but rather at moments in time.

In the case of the “hot dogs will kill you unless there are sesame seeds on your bun” article, for example, the researchers utilized one solitary dietary recall session upon which to base their ridiculously specific, ridiculous conclusions.

People’s diets also change over time for various reasons, and of course people themselves are very different. You might imagine that people whose diets are rich in chicken wings, sugared soda, and hot dogs will have markedly different lifestyles and demographics than those whose diets are rich in walnuts, sashimi, and avocados.

So why do we keep seeing studies like this being published? Is it because they’re basically clickbait catnip for journals and newspapers, and in our publish-or-perish attention-seeking world, that means they not only get a pass but they get a press release? Is it because peer review is broken and everyone knows it? Is it because as a society, we’re frogs who have been steeping for decades in the ever-heated pot of nutritional nonsense, and consequently don’t think to question it?

I don’t know the answer to any of those questions, but one thing I do know: Studies on single foods’ impact on life length are pointless, impossible, and idiotic, and people who share them noncritically should be forever shunned – or at the very least, forever ignored.

Yoni Freedhoff, MD, is an associate professor of family medicine at the University of Ottawa and medical director of the Bariatric Medical Institute, a nonsurgical weight-management center.

A version of this article first appeared on Medscape.com.

Not sure if you’ve heard the news, but eating a single hot dog will apparently cost you 36 minutes of healthy life. My first thought when hearing this was of course the same as everyone else’s: Poor Joey Chestnut, multiyear winner of Nathan’s annual hot dog–eating contest.

He won this year’s contest with 76 hot dogs, which puts his total number of competition-consumed hot dogs at 1,089 – which cost him, it would seem, 27.2 days of healthy life. Unless, of course, every hot dog he inhaled came with a bun hosting two portions of sesame seeds, which in turn would buy him 50 extra minutes of life (25 minutes per portion, you see) and would consequently have extended his life by 10.6 days.

Clearly, the obvious solution here is to ensure that all hot dog buns have two portions of sesame seeds on them moving forward; that way, hot dogs can transition from being poisonous killers to antiaging medicine.

The other solution, albeit less exciting, perhaps, is for researchers to stop studying single foods’ impacts on health, and/or for journals to stop publishing them, and/or for the media to stop promoting them – because they are all as ridiculously useless as the example above highlighting findings from a newly published study in Nature Food, entitled “Small targeted dietary changes can yield substantial gains for human health and the environment.”

While no doubt we would all love for diet and health to be so well understood that we could choose specific single foods (knowing that they would prolong our lives) while avoiding single foods that would shorten it, there’s this unfortunate truth that the degree of confounding among food alone is staggering. People eat thousands of different foods in thousands of different dietary combinations. Moreover, most (all?) research conducted on dietary impacts of single foods on health don’t actually track consumption of those specific foods over time, let alone their interactions with all other foods consumed, but rather at moments in time.

In the case of the “hot dogs will kill you unless there are sesame seeds on your bun” article, for example, the researchers utilized one solitary dietary recall session upon which to base their ridiculously specific, ridiculous conclusions.

People’s diets also change over time for various reasons, and of course people themselves are very different. You might imagine that people whose diets are rich in chicken wings, sugared soda, and hot dogs will have markedly different lifestyles and demographics than those whose diets are rich in walnuts, sashimi, and avocados.

So why do we keep seeing studies like this being published? Is it because they’re basically clickbait catnip for journals and newspapers, and in our publish-or-perish attention-seeking world, that means they not only get a pass but they get a press release? Is it because peer review is broken and everyone knows it? Is it because as a society, we’re frogs who have been steeping for decades in the ever-heated pot of nutritional nonsense, and consequently don’t think to question it?

I don’t know the answer to any of those questions, but one thing I do know: Studies on single foods’ impact on life length are pointless, impossible, and idiotic, and people who share them noncritically should be forever shunned – or at the very least, forever ignored.

Yoni Freedhoff, MD, is an associate professor of family medicine at the University of Ottawa and medical director of the Bariatric Medical Institute, a nonsurgical weight-management center.

A version of this article first appeared on Medscape.com.

The featured report from the 6,000-patient EMPEROR-Preserved trial at the virtual annual congress of the European Society of Cardiology drew lots of attention for its headline finding: the first unequivocal demonstration that a medication, empagliflozin, can significantly reduce the rate of cardiovascular death and hospitalization for heart failure in patients with heart failure with preserved ejection fraction (HFpEF, a left ventricular ejection fraction of more than 40%), with the details simultaneously published online.

But at the same time, the EMPEROR-Preserved investigators released four additional reports with a lot more outcome analyses that also deserve some attention.
 

The puzzling neutral effect on renal events

Perhaps the most surprising and complicated set of findings among the main EMPEROR-Preserved outcomes involved renal outcomes.

The trial’s primary outcome was the combined rate of cardiovascular death or hospitalization for heart failure (HHF), and the results showed that treatment with empagliflozin (Jardiance) for a median of 26 months on top of standard treatment for patients with HFpEF led to a significant 21% relative risk reduction, compared with placebo-treated patients.

The trial had two prespecified secondary outcomes. One was the total number of HHF, which dropped by a significant 27%, compared with placebo. The second was the mean change in slope of estimated glomerular filtration rate (eGFR) on an annualized basis, and the empagliflozin regimen reduced the cumulative annual deficit, compared with placebo by an average of 1.36 mL/min per 1.73 m^2, a significant difference.

This preservation of renal function was consistent with results from many prior studies of empagliflozin and all of the other U.S.-approved agents from the sodium-glucose cotransporter 2 inhibitor class. Preservation of renal function and a reduction in renal events has become a hallmark property of all agents in the SGLT2 inhibitor class both in patients with type 2 diabetes, as well as in those without diabetes but with heart failure with reduced ejection fraction (HFrEF) or with chronic kidney disease.

EMPEROR-Preserved threw a wrench into what had been an unbroken history of renal protection by SGLT2 inhibitors. That happened when a prespecified endpoint of the study – a composite renal outcome defined as time to first occurrence of chronic dialysis, renal transplantation, a sustained reduction of at least 40% in eGFR, or a sustained drop in eGFR of more than 10 or 15 mL/min per 1.73 m2 from baseline – yielded an unexpected neutral finding.

For this composite renal outcome, EMPEROR-Preserved showed a nonsignificant 5% reduction, compared with placebo, a result that both differed from what had been seen in essentially all the other SGLT2 inhibitor trials that had looked at this, but which also seemed at odds with the observed significant preservation of renal function that seemed substantial enough to produce a clinically meaningful benefit.
 

Renal effects blunted in HFpEF

The immediate upshot was a letter published by several EMPEROR-Preserved investigators that spelled out this discrepancy and came to the jolting conclusion that “eGFR slope analysis has limitations as a surrogate for predicting the effect of drugs on renal outcomes in patients with heart failure.”

The same authors, along with some additional associates, also published a second letter that noted a further unexpected twist with the renal outcome: “In prior large-scale clinical trials, the effect of SGLT2 inhibitors on heart failure and renal outcomes had consistently tracked together,” they noted, but in this case it didn’t, a discordance they said was “extraordinarily puzzling”.

MDedge News

This led the study’s leaders to reanalyze the renal outcomes using a different definition, one that Milton Packer, MD, who helped design the trial and oversaw several of its analyses, called “a more conventional definition of renal events,” during his presentation of these findings at the congress. The researchers swapped out a 40% drop from baseline eGFR as an event and replaced it with a 50% decline, a change designed to screen out less severe, and often transient, reductions in kidney function that have less lasting impact on health. They also added an additional component to the composite endpoint, renal death. A revised analysis using this new renal composite outcome appeared in the European Journal of Heart Failure letter.

This change cut the total number of renal events tallied in the trial nearly in half, down to 112, and showed a more robust decline in renal events with empagliflozin treatment compared with the initial analysis, although the drop remained nonsignificant. The revised analysis also showed that the overall, nonsignificant 22% relative reduction in renal events in patients on empagliflozin, compared with placebo, dwindled down to completely nonexistent in the tertile of patients with a left ventricular ejection fraction of 60% or greater. In this tertile the hazard ratio actually showed a nonsignificant point estimate of a 24% increased rate of renal events on empagliflozin, with the caveat that this subgroup now included a total of just 40 total events between the two treatment arms. (Each of the two other tertiles also had roughly the same number of total events.)

The biggest effect on renal-event reduction was in the tertile of patients with an ejection fraction of 41%-49%, in which empagliflozin treatment was linked with a significant 59% cut in renal events, compared with placebo. The analysis also showed significant heterogeneity in thus outcome between this subgroup and the other two tertiles that had higher ejection fractions and showed reduced rates of protection by empagliflozin against renal events.

This apparent blunting of a renal effect despite preservation of renal function seemed to mimic the blunting of the primary cardiovascular outcome effect that also appeared in patients with ejection fractions in the 60%-65% range or above.

“If we knew what blunted the effect of empagliflozin on heart failure outcomes at higher ejection fraction levels, we think the same explanation may also apply to the blunting of effect on renal outcomes, but right now we do not know the answer to either question,” Dr. Packer said in an interview. He’s suggested that one possibility is that many of the enrolled patients identified as having HFpEF, but with these high ejection fractions may have not actually had HFpEF, and their signs and symptoms may have instead resulted from atrial fibrillation.

“Many patients with an ejection fraction of 60%-65% and above had atrial fibrillation,” he noted, with a prevalence at enrollment in this subgroup of about 50%. Atrial fibrillation can cause dyspnea, a hallmark symptom leading to diagnosis of heart failure, and it also increases levels of N-terminal of the prohormone brain natriuretic peptide, a metric that served as a gatekeeper for entry into the trial. “Essentially, we are saying that many of the criteria that we specified to ensure that patients had heart failure probably did not work very well in patients with an ejection fraction of 65% or greater,” said Dr. Packer, a cardiologist at Baylor University Medical Center in Dallas. “We need to figure out who these patients are.”

Some experts not involved with the study voiced skepticism that the renal findings reflected a real issue.

“I’m quite optimistic that in the long-term the effect on eGFR will translate into renal protection,” said Rudolf A. de Boer, MD, PhD, a professor of translational cardiology at University Medical Center Groningen (the Netherlands), and designated discussant at the congress for the presentation by Dr. Packer.

Catherine Hackett/MDedge News

John J.V. McMurray, MD, a professor of cardiology and a heart failure specialist at Glasgow University, speculated that the unexpected renal outcomes data may relate to the initial decline in renal function produced by treatment with SGLT2 inhibitors despite their longer-term enhancement of renal protection.

“If you use a treatment that protects the kidneys in the long-term but causes an initial dip in eGFR, more patients receiving that treatment will have an early ‘event,’ ” he noted in an interview. He also cautioned about the dangers of subgroup analyses that dice the study population into small cohorts.

“Trials are powered to look at the effect of treatment in the overall population. Everything else is exploratory, underpowered, and subject to the play of chance,” Dr. McMurray stressed.
 

Counting additional cardiovascular disease events allows more analyses

A third auxiliary report from the EMPEROR-Preserved investigators performed several prespecified analyses that depended on adding additional cardiovascular disease endpoints to the core tallies of cardiovascular death or HHF – such as emergent, urgent, and outpatient events that reflected worsening heart failure – and also included information on diuretic and vasopressor use because of worsening heart failure. The increased event numbers allowed the researchers to perform 30 additional analyses included in this report, according to the count kept by Dr. Packer who was the lead author.

He highlighted several of the additional results in this paper that documented benefits from empagliflozin treatment, compared with placebo:

• A significant 29% reduction in the need for admission to a cardiac care unit or intensive care unit during an HHF.
• A nonsignificant 33% reduction in the need for intravenous vasopressors or positive inotropic drugs during HHF.
• A significantly increased rate of patients achieving a higher New York Heart Association functional class. For example, after the first year of treatment patients who received empagliflozin had a 37% higher rate of functional class improvement, compared with patients who received placebo.

Dr. McMurray had his own list of key takeaways from this paper, including:

• Among patients who needed hospitalization, “those treated with empagliflozin were less sick than those in the placebo group.”
• In addition to reducing HHF empagliflozin treatment also reduced episodes of outpatient worsening as reflected by their receipt of intensified diuretic treatment, which occurred a significant 27% less often, compared with patients on placebo.
• Treatment with empagliflozin also linked with a significant 39% relative reduction in emergency or urgent-care visits that required intravenous therapy.

Empagliflozin’s performance relative to sacubitril/valsartan

The fourth additional report focused on a post hoc, cross-trial comparison of the results from EMPEROR-Preserved and from another recent trial that, like EMPEROR-Preserved, assessed in patients with HFpEF a drug previously proven to work quite well in patients with HFrEF. The comparator drug was sacubitril/valsartan (Entresto), which underwent testing in patients with HFpEF in the PARAGON-HF trial.

The primary outcome of PARAGON-HF, which randomized 4,822 patients, was reduction in cardiovascular death and in total HHF. This dropped by a relative 13%, compared with placebo, during a median of 35 months, a between-group difference that came close to but did not achieve significance (P = .06). Despite this limitation, the Food and Drug Administration in February 2021 loosened the indication for using sacubitril/valsartan in patients with heart failure and a “below normal” ejection fraction, a category that can include many patients considered to have HFpEF.

Although the researchers who ran this analysis, including Dr. Packer, who was the first author, admitted that “comparison of effect sizes across trials is fraught with difficulties,” they nonetheless concluded from their analysis that “for all outcomes that included HHF the effect size was larger for empagliflozin than for sacubitril/valsartan.”

Dr. McMurray, a lead instigator for PARAGON-HF, said there was little to take away from this analysis.

“The patient populations were different, and sacubitril/valsartan was compared against an active therapy, valsartan,” while in EMPEROR-Preserved empagliflozin compared against placebo. “Most of us believe that sacubitril/valsartan and SGLT2 inhibitors work in different but complementary ways, and their benefits are additive. You would want patients with HFpEF or HFrEF to take both,” he said in an interview.

Dr. Packer agreed with that approach and added that he would probably also prescribe a third agent, spironolactone, to many patients with HFpEF.

EMPEROR-Preserved was sponsored by Boehringer Ingelheim and Eli Lilly, which jointly market empagliflozin (Jardiance). PARAGON-HF was sponsored by Novartis, which markets sacubitril/valsartan (Entresto). Dr. Packer has received consulting fees from Boehringer Ingelheim and from numerous other companies. Dr. de Boer has research contracts with Boehringer Ingelheim as well as from Abbott, AstraZeneca, Cardior, Ionis, Novo Nordisk, and Roche, and he has been a consultant to Novartis as well as to Abbott, AstraZeneca, Gayer, and Roche. Dr. McMurray led trials of sacubitril/valsartan sponsored by Novartis, and his institution has received compensation for his participation in studies sponsored by Abbvie, AstraZeneca, Cardurion, DalCor, GlaxoSmithKline, Pfizer, and Theracos.

mzoler@mdedge.com

The featured report from the 6,000-patient EMPEROR-Preserved trial at the virtual annual congress of the European Society of Cardiology drew lots of attention for its headline finding: the first unequivocal demonstration that a medication, empagliflozin, can significantly reduce the rate of cardiovascular death and hospitalization for heart failure in patients with heart failure with preserved ejection fraction (HFpEF, a left ventricular ejection fraction of more than 40%), with the details simultaneously published online.

But at the same time, the EMPEROR-Preserved investigators released four additional reports with a lot more outcome analyses that also deserve some attention.
 

The puzzling neutral effect on renal events

Perhaps the most surprising and complicated set of findings among the main EMPEROR-Preserved outcomes involved renal outcomes.

The trial’s primary outcome was the combined rate of cardiovascular death or hospitalization for heart failure (HHF), and the results showed that treatment with empagliflozin (Jardiance) for a median of 26 months on top of standard treatment for patients with HFpEF led to a significant 21% relative risk reduction, compared with placebo-treated patients.

The trial had two prespecified secondary outcomes. One was the total number of HHF, which dropped by a significant 27%, compared with placebo. The second was the mean change in slope of estimated glomerular filtration rate (eGFR) on an annualized basis, and the empagliflozin regimen reduced the cumulative annual deficit, compared with placebo by an average of 1.36 mL/min per 1.73 m^2, a significant difference.

This preservation of renal function was consistent with results from many prior studies of empagliflozin and all of the other U.S.-approved agents from the sodium-glucose cotransporter 2 inhibitor class. Preservation of renal function and a reduction in renal events has become a hallmark property of all agents in the SGLT2 inhibitor class both in patients with type 2 diabetes, as well as in those without diabetes but with heart failure with reduced ejection fraction (HFrEF) or with chronic kidney disease.

EMPEROR-Preserved threw a wrench into what had been an unbroken history of renal protection by SGLT2 inhibitors. That happened when a prespecified endpoint of the study – a composite renal outcome defined as time to first occurrence of chronic dialysis, renal transplantation, a sustained reduction of at least 40% in eGFR, or a sustained drop in eGFR of more than 10 or 15 mL/min per 1.73 m2 from baseline – yielded an unexpected neutral finding.

For this composite renal outcome, EMPEROR-Preserved showed a nonsignificant 5% reduction, compared with placebo, a result that both differed from what had been seen in essentially all the other SGLT2 inhibitor trials that had looked at this, but which also seemed at odds with the observed significant preservation of renal function that seemed substantial enough to produce a clinically meaningful benefit.
 

Renal effects blunted in HFpEF

The immediate upshot was a letter published by several EMPEROR-Preserved investigators that spelled out this discrepancy and came to the jolting conclusion that “eGFR slope analysis has limitations as a surrogate for predicting the effect of drugs on renal outcomes in patients with heart failure.”

The same authors, along with some additional associates, also published a second letter that noted a further unexpected twist with the renal outcome: “In prior large-scale clinical trials, the effect of SGLT2 inhibitors on heart failure and renal outcomes had consistently tracked together,” they noted, but in this case it didn’t, a discordance they said was “extraordinarily puzzling”.

MDedge News

This led the study’s leaders to reanalyze the renal outcomes using a different definition, one that Milton Packer, MD, who helped design the trial and oversaw several of its analyses, called “a more conventional definition of renal events,” during his presentation of these findings at the congress. The researchers swapped out a 40% drop from baseline eGFR as an event and replaced it with a 50% decline, a change designed to screen out less severe, and often transient, reductions in kidney function that have less lasting impact on health. They also added an additional component to the composite endpoint, renal death. A revised analysis using this new renal composite outcome appeared in the European Journal of Heart Failure letter.

This change cut the total number of renal events tallied in the trial nearly in half, down to 112, and showed a more robust decline in renal events with empagliflozin treatment compared with the initial analysis, although the drop remained nonsignificant. The revised analysis also showed that the overall, nonsignificant 22% relative reduction in renal events in patients on empagliflozin, compared with placebo, dwindled down to completely nonexistent in the tertile of patients with a left ventricular ejection fraction of 60% or greater. In this tertile the hazard ratio actually showed a nonsignificant point estimate of a 24% increased rate of renal events on empagliflozin, with the caveat that this subgroup now included a total of just 40 total events between the two treatment arms. (Each of the two other tertiles also had roughly the same number of total events.)

The biggest effect on renal-event reduction was in the tertile of patients with an ejection fraction of 41%-49%, in which empagliflozin treatment was linked with a significant 59% cut in renal events, compared with placebo. The analysis also showed significant heterogeneity in thus outcome between this subgroup and the other two tertiles that had higher ejection fractions and showed reduced rates of protection by empagliflozin against renal events.

This apparent blunting of a renal effect despite preservation of renal function seemed to mimic the blunting of the primary cardiovascular outcome effect that also appeared in patients with ejection fractions in the 60%-65% range or above.

“If we knew what blunted the effect of empagliflozin on heart failure outcomes at higher ejection fraction levels, we think the same explanation may also apply to the blunting of effect on renal outcomes, but right now we do not know the answer to either question,” Dr. Packer said in an interview. He’s suggested that one possibility is that many of the enrolled patients identified as having HFpEF, but with these high ejection fractions may have not actually had HFpEF, and their signs and symptoms may have instead resulted from atrial fibrillation.

“Many patients with an ejection fraction of 60%-65% and above had atrial fibrillation,” he noted, with a prevalence at enrollment in this subgroup of about 50%. Atrial fibrillation can cause dyspnea, a hallmark symptom leading to diagnosis of heart failure, and it also increases levels of N-terminal of the prohormone brain natriuretic peptide, a metric that served as a gatekeeper for entry into the trial. “Essentially, we are saying that many of the criteria that we specified to ensure that patients had heart failure probably did not work very well in patients with an ejection fraction of 65% or greater,” said Dr. Packer, a cardiologist at Baylor University Medical Center in Dallas. “We need to figure out who these patients are.”

Some experts not involved with the study voiced skepticism that the renal findings reflected a real issue.

“I’m quite optimistic that in the long-term the effect on eGFR will translate into renal protection,” said Rudolf A. de Boer, MD, PhD, a professor of translational cardiology at University Medical Center Groningen (the Netherlands), and designated discussant at the congress for the presentation by Dr. Packer.

Catherine Hackett/MDedge News

John J.V. McMurray, MD, a professor of cardiology and a heart failure specialist at Glasgow University, speculated that the unexpected renal outcomes data may relate to the initial decline in renal function produced by treatment with SGLT2 inhibitors despite their longer-term enhancement of renal protection.

“If you use a treatment that protects the kidneys in the long-term but causes an initial dip in eGFR, more patients receiving that treatment will have an early ‘event,’ ” he noted in an interview. He also cautioned about the dangers of subgroup analyses that dice the study population into small cohorts.

“Trials are powered to look at the effect of treatment in the overall population. Everything else is exploratory, underpowered, and subject to the play of chance,” Dr. McMurray stressed.
 

Counting additional cardiovascular disease events allows more analyses

A third auxiliary report from the EMPEROR-Preserved investigators performed several prespecified analyses that depended on adding additional cardiovascular disease endpoints to the core tallies of cardiovascular death or HHF – such as emergent, urgent, and outpatient events that reflected worsening heart failure – and also included information on diuretic and vasopressor use because of worsening heart failure. The increased event numbers allowed the researchers to perform 30 additional analyses included in this report, according to the count kept by Dr. Packer who was the lead author.

He highlighted several of the additional results in this paper that documented benefits from empagliflozin treatment, compared with placebo:

• A significant 29% reduction in the need for admission to a cardiac care unit or intensive care unit during an HHF.
• A nonsignificant 33% reduction in the need for intravenous vasopressors or positive inotropic drugs during HHF.
• A significantly increased rate of patients achieving a higher New York Heart Association functional class. For example, after the first year of treatment patients who received empagliflozin had a 37% higher rate of functional class improvement, compared with patients who received placebo.

Dr. McMurray had his own list of key takeaways from this paper, including:

• Among patients who needed hospitalization, “those treated with empagliflozin were less sick than those in the placebo group.”
• In addition to reducing HHF empagliflozin treatment also reduced episodes of outpatient worsening as reflected by their receipt of intensified diuretic treatment, which occurred a significant 27% less often, compared with patients on placebo.
• Treatment with empagliflozin also linked with a significant 39% relative reduction in emergency or urgent-care visits that required intravenous therapy.

Empagliflozin’s performance relative to sacubitril/valsartan

The fourth additional report focused on a post hoc, cross-trial comparison of the results from EMPEROR-Preserved and from another recent trial that, like EMPEROR-Preserved, assessed in patients with HFpEF a drug previously proven to work quite well in patients with HFrEF. The comparator drug was sacubitril/valsartan (Entresto), which underwent testing in patients with HFpEF in the PARAGON-HF trial.

The primary outcome of PARAGON-HF, which randomized 4,822 patients, was reduction in cardiovascular death and in total HHF. This dropped by a relative 13%, compared with placebo, during a median of 35 months, a between-group difference that came close to but did not achieve significance (P = .06). Despite this limitation, the Food and Drug Administration in February 2021 loosened the indication for using sacubitril/valsartan in patients with heart failure and a “below normal” ejection fraction, a category that can include many patients considered to have HFpEF.

Although the researchers who ran this analysis, including Dr. Packer, who was the first author, admitted that “comparison of effect sizes across trials is fraught with difficulties,” they nonetheless concluded from their analysis that “for all outcomes that included HHF the effect size was larger for empagliflozin than for sacubitril/valsartan.”

Dr. McMurray, a lead instigator for PARAGON-HF, said there was little to take away from this analysis.

“The patient populations were different, and sacubitril/valsartan was compared against an active therapy, valsartan,” while in EMPEROR-Preserved empagliflozin compared against placebo. “Most of us believe that sacubitril/valsartan and SGLT2 inhibitors work in different but complementary ways, and their benefits are additive. You would want patients with HFpEF or HFrEF to take both,” he said in an interview.

Dr. Packer agreed with that approach and added that he would probably also prescribe a third agent, spironolactone, to many patients with HFpEF.

EMPEROR-Preserved was sponsored by Boehringer Ingelheim and Eli Lilly, which jointly market empagliflozin (Jardiance). PARAGON-HF was sponsored by Novartis, which markets sacubitril/valsartan (Entresto). Dr. Packer has received consulting fees from Boehringer Ingelheim and from numerous other companies. Dr. de Boer has research contracts with Boehringer Ingelheim as well as from Abbott, AstraZeneca, Cardior, Ionis, Novo Nordisk, and Roche, and he has been a consultant to Novartis as well as to Abbott, AstraZeneca, Gayer, and Roche. Dr. McMurray led trials of sacubitril/valsartan sponsored by Novartis, and his institution has received compensation for his participation in studies sponsored by Abbvie, AstraZeneca, Cardurion, DalCor, GlaxoSmithKline, Pfizer, and Theracos.

mzoler@mdedge.com

The featured report from the 6,000-patient EMPEROR-Preserved trial at the virtual annual congress of the European Society of Cardiology drew lots of attention for its headline finding: the first unequivocal demonstration that a medication, empagliflozin, can significantly reduce the rate of cardiovascular death and hospitalization for heart failure in patients with heart failure with preserved ejection fraction (HFpEF, a left ventricular ejection fraction of more than 40%), with the details simultaneously published online.

But at the same time, the EMPEROR-Preserved investigators released four additional reports with a lot more outcome analyses that also deserve some attention.
 

The puzzling neutral effect on renal events

Perhaps the most surprising and complicated set of findings among the main EMPEROR-Preserved outcomes involved renal outcomes.

The trial’s primary outcome was the combined rate of cardiovascular death or hospitalization for heart failure (HHF), and the results showed that treatment with empagliflozin (Jardiance) for a median of 26 months on top of standard treatment for patients with HFpEF led to a significant 21% relative risk reduction, compared with placebo-treated patients.

The trial had two prespecified secondary outcomes. One was the total number of HHF, which dropped by a significant 27%, compared with placebo. The second was the mean change in slope of estimated glomerular filtration rate (eGFR) on an annualized basis, and the empagliflozin regimen reduced the cumulative annual deficit, compared with placebo by an average of 1.36 mL/min per 1.73 m^2, a significant difference.

This preservation of renal function was consistent with results from many prior studies of empagliflozin and all of the other U.S.-approved agents from the sodium-glucose cotransporter 2 inhibitor class. Preservation of renal function and a reduction in renal events has become a hallmark property of all agents in the SGLT2 inhibitor class both in patients with type 2 diabetes, as well as in those without diabetes but with heart failure with reduced ejection fraction (HFrEF) or with chronic kidney disease.

EMPEROR-Preserved threw a wrench into what had been an unbroken history of renal protection by SGLT2 inhibitors. That happened when a prespecified endpoint of the study – a composite renal outcome defined as time to first occurrence of chronic dialysis, renal transplantation, a sustained reduction of at least 40% in eGFR, or a sustained drop in eGFR of more than 10 or 15 mL/min per 1.73 m2 from baseline – yielded an unexpected neutral finding.

For this composite renal outcome, EMPEROR-Preserved showed a nonsignificant 5% reduction, compared with placebo, a result that both differed from what had been seen in essentially all the other SGLT2 inhibitor trials that had looked at this, but which also seemed at odds with the observed significant preservation of renal function that seemed substantial enough to produce a clinically meaningful benefit.
 

Renal effects blunted in HFpEF

The immediate upshot was a letter published by several EMPEROR-Preserved investigators that spelled out this discrepancy and came to the jolting conclusion that “eGFR slope analysis has limitations as a surrogate for predicting the effect of drugs on renal outcomes in patients with heart failure.”

The same authors, along with some additional associates, also published a second letter that noted a further unexpected twist with the renal outcome: “In prior large-scale clinical trials, the effect of SGLT2 inhibitors on heart failure and renal outcomes had consistently tracked together,” they noted, but in this case it didn’t, a discordance they said was “extraordinarily puzzling”.

MDedge News

This led the study’s leaders to reanalyze the renal outcomes using a different definition, one that Milton Packer, MD, who helped design the trial and oversaw several of its analyses, called “a more conventional definition of renal events,” during his presentation of these findings at the congress. The researchers swapped out a 40% drop from baseline eGFR as an event and replaced it with a 50% decline, a change designed to screen out less severe, and often transient, reductions in kidney function that have less lasting impact on health. They also added an additional component to the composite endpoint, renal death. A revised analysis using this new renal composite outcome appeared in the European Journal of Heart Failure letter.

This change cut the total number of renal events tallied in the trial nearly in half, down to 112, and showed a more robust decline in renal events with empagliflozin treatment compared with the initial analysis, although the drop remained nonsignificant. The revised analysis also showed that the overall, nonsignificant 22% relative reduction in renal events in patients on empagliflozin, compared with placebo, dwindled down to completely nonexistent in the tertile of patients with a left ventricular ejection fraction of 60% or greater. In this tertile the hazard ratio actually showed a nonsignificant point estimate of a 24% increased rate of renal events on empagliflozin, with the caveat that this subgroup now included a total of just 40 total events between the two treatment arms. (Each of the two other tertiles also had roughly the same number of total events.)

The biggest effect on renal-event reduction was in the tertile of patients with an ejection fraction of 41%-49%, in which empagliflozin treatment was linked with a significant 59% cut in renal events, compared with placebo. The analysis also showed significant heterogeneity in thus outcome between this subgroup and the other two tertiles that had higher ejection fractions and showed reduced rates of protection by empagliflozin against renal events.

This apparent blunting of a renal effect despite preservation of renal function seemed to mimic the blunting of the primary cardiovascular outcome effect that also appeared in patients with ejection fractions in the 60%-65% range or above.

“If we knew what blunted the effect of empagliflozin on heart failure outcomes at higher ejection fraction levels, we think the same explanation may also apply to the blunting of effect on renal outcomes, but right now we do not know the answer to either question,” Dr. Packer said in an interview. He’s suggested that one possibility is that many of the enrolled patients identified as having HFpEF, but with these high ejection fractions may have not actually had HFpEF, and their signs and symptoms may have instead resulted from atrial fibrillation.

“Many patients with an ejection fraction of 60%-65% and above had atrial fibrillation,” he noted, with a prevalence at enrollment in this subgroup of about 50%. Atrial fibrillation can cause dyspnea, a hallmark symptom leading to diagnosis of heart failure, and it also increases levels of N-terminal of the prohormone brain natriuretic peptide, a metric that served as a gatekeeper for entry into the trial. “Essentially, we are saying that many of the criteria that we specified to ensure that patients had heart failure probably did not work very well in patients with an ejection fraction of 65% or greater,” said Dr. Packer, a cardiologist at Baylor University Medical Center in Dallas. “We need to figure out who these patients are.”

Some experts not involved with the study voiced skepticism that the renal findings reflected a real issue.

“I’m quite optimistic that in the long-term the effect on eGFR will translate into renal protection,” said Rudolf A. de Boer, MD, PhD, a professor of translational cardiology at University Medical Center Groningen (the Netherlands), and designated discussant at the congress for the presentation by Dr. Packer.

Catherine Hackett/MDedge News

John J.V. McMurray, MD, a professor of cardiology and a heart failure specialist at Glasgow University, speculated that the unexpected renal outcomes data may relate to the initial decline in renal function produced by treatment with SGLT2 inhibitors despite their longer-term enhancement of renal protection.

“If you use a treatment that protects the kidneys in the long-term but causes an initial dip in eGFR, more patients receiving that treatment will have an early ‘event,’ ” he noted in an interview. He also cautioned about the dangers of subgroup analyses that dice the study population into small cohorts.

“Trials are powered to look at the effect of treatment in the overall population. Everything else is exploratory, underpowered, and subject to the play of chance,” Dr. McMurray stressed.
 

Counting additional cardiovascular disease events allows more analyses

A third auxiliary report from the EMPEROR-Preserved investigators performed several prespecified analyses that depended on adding additional cardiovascular disease endpoints to the core tallies of cardiovascular death or HHF – such as emergent, urgent, and outpatient events that reflected worsening heart failure – and also included information on diuretic and vasopressor use because of worsening heart failure. The increased event numbers allowed the researchers to perform 30 additional analyses included in this report, according to the count kept by Dr. Packer who was the lead author.

He highlighted several of the additional results in this paper that documented benefits from empagliflozin treatment, compared with placebo:

• A significant 29% reduction in the need for admission to a cardiac care unit or intensive care unit during an HHF.
• A nonsignificant 33% reduction in the need for intravenous vasopressors or positive inotropic drugs during HHF.
• A significantly increased rate of patients achieving a higher New York Heart Association functional class. For example, after the first year of treatment patients who received empagliflozin had a 37% higher rate of functional class improvement, compared with patients who received placebo.

Dr. McMurray had his own list of key takeaways from this paper, including:

• Among patients who needed hospitalization, “those treated with empagliflozin were less sick than those in the placebo group.”
• In addition to reducing HHF empagliflozin treatment also reduced episodes of outpatient worsening as reflected by their receipt of intensified diuretic treatment, which occurred a significant 27% less often, compared with patients on placebo.
• Treatment with empagliflozin also linked with a significant 39% relative reduction in emergency or urgent-care visits that required intravenous therapy.

Empagliflozin’s performance relative to sacubitril/valsartan

The fourth additional report focused on a post hoc, cross-trial comparison of the results from EMPEROR-Preserved and from another recent trial that, like EMPEROR-Preserved, assessed in patients with HFpEF a drug previously proven to work quite well in patients with HFrEF. The comparator drug was sacubitril/valsartan (Entresto), which underwent testing in patients with HFpEF in the PARAGON-HF trial.

The primary outcome of PARAGON-HF, which randomized 4,822 patients, was reduction in cardiovascular death and in total HHF. This dropped by a relative 13%, compared with placebo, during a median of 35 months, a between-group difference that came close to but did not achieve significance (P = .06). Despite this limitation, the Food and Drug Administration in February 2021 loosened the indication for using sacubitril/valsartan in patients with heart failure and a “below normal” ejection fraction, a category that can include many patients considered to have HFpEF.

Although the researchers who ran this analysis, including Dr. Packer, who was the first author, admitted that “comparison of effect sizes across trials is fraught with difficulties,” they nonetheless concluded from their analysis that “for all outcomes that included HHF the effect size was larger for empagliflozin than for sacubitril/valsartan.”

Dr. McMurray, a lead instigator for PARAGON-HF, said there was little to take away from this analysis.

“The patient populations were different, and sacubitril/valsartan was compared against an active therapy, valsartan,” while in EMPEROR-Preserved empagliflozin compared against placebo. “Most of us believe that sacubitril/valsartan and SGLT2 inhibitors work in different but complementary ways, and their benefits are additive. You would want patients with HFpEF or HFrEF to take both,” he said in an interview.

Dr. Packer agreed with that approach and added that he would probably also prescribe a third agent, spironolactone, to many patients with HFpEF.

EMPEROR-Preserved was sponsored by Boehringer Ingelheim and Eli Lilly, which jointly market empagliflozin (Jardiance). PARAGON-HF was sponsored by Novartis, which markets sacubitril/valsartan (Entresto). Dr. Packer has received consulting fees from Boehringer Ingelheim and from numerous other companies. Dr. de Boer has research contracts with Boehringer Ingelheim as well as from Abbott, AstraZeneca, Cardior, Ionis, Novo Nordisk, and Roche, and he has been a consultant to Novartis as well as to Abbott, AstraZeneca, Gayer, and Roche. Dr. McMurray led trials of sacubitril/valsartan sponsored by Novartis, and his institution has received compensation for his participation in studies sponsored by Abbvie, AstraZeneca, Cardurion, DalCor, GlaxoSmithKline, Pfizer, and Theracos.

mzoler@mdedge.com

Consuming alcohol increases the risk for an atrial fibrillation (AF) episode hours later, according to a study published online Aug. 30 in Annals of Internal Medicine. Modifying the drinking behavior of patients with a history of AF events could make a difference.

coldsnowstorm/iStock / Getty Images Plus

Past research has associated long-term alcohol consumption with the development of AF, and abstinence from alcohol has been associated with a lower overall AF burden. However, lead study author Greg Marcus, MD, a cardioelectrophysiolgist at the University of California, San Francisco, noted that many patients say that alcohol is a trigger for discrete AF episodes.

To test whether that was possible, the researchers enrolled 100 patients who had a history of AF events and who consumed at least one drink per month. Participants wore a transdermal alcohol sensor and an ambulatory, single-lead electrocardiogram device for 4 weeks. They were instructed to press a button on the electrocardiogram device each time they consumed a standard alcoholic beverage. In addition, blood samples were tested for phosphatidylethanol (PEth) at the participants’ 2-week and 4-week visits. PEth is a phospholipid formed in the blood after alcohol intake. It remains in the blood for up to 4 weeks after alcohol consumption.

The study findings confirmed what the patients had reported. The odds of an AF episode were 38% greater with every 0.1% increase in peak blood alcohol concentration over the previous 12 hours (odds ratio [OR], 1.38; 95% confidence interval, 1.04-1.83; P = .024). Moreover, an episode of AF was associated with twofold greater odds (OR, 2.02; 95% CI, 1.38-3.17) of having consumed one alcoholic drink in the past 4 hours. It was associated with more than threefold greater odds of having consumed two or more drinks (OR, 3.58; 95% CI, 1.63-7.89).

“The major takeaway is, among atrial fibrillation patients, consuming alcohol substantially heightened their risk for any given atrial fibrillation event in the subsequent few hours,” Dr. Marcus said. “The more alcohol consumed, the higher that risk.”

The acute effect of alcohol on these arrhythmias also means that modifying alcohol consumption could immediately benefit some patients. “These data combined with other evidence suggest that recommending minimizing or completely eliminating alcohol will likely be helpful to them,” Dr. Marcus said.

The study’s reliance on wearables and sensors was impressive, said Mariann R. Piano, PhD, director of the Center for Research Development and Scholarship, Vanderbilt University, Nashville, Tenn. Often, these types of studies are “self-reported and confounded by recall bias,” she said. But this study passively documented arrhythmia events and blood alcohol level without any patient input. The additional measures of alcohol consumption were used to validate the blood alcohol sensor.

The study’s focus on patients with a history of AF highlighted a high-risk patient group, according to Dr. Piano, who coauthored an editorial about the study. However, the findings may not be applicable to the general population.

Dr. Marcus said alcohol’s role in causing these types of arrhythmias is probably a matter of degree. AF patients are more prone to events than is the general population and are therefore more sensitive to alcohol, he said. But excessive alcohol consumption could increase the chance of AF in the general population.

The study is not without its limitations, however. For instance, “it would have been really ideal if we knew what that blood alcohol was” before an episode, Dr. Piano said. The number of drinks is a good start, but two drinks can affect persons differently, depending on their weight and height. Also, baseline PEth values suggest that patients had been drinking before the study, she said. Ideally, patients could have been asked to abstain from alcohol for a period before the study to determine a negative baseline PEth value and minimize the effects of previous drinking on AF episodes.

Moving forward, this research should inform how clinicians care for their AF patients, both experts agree. “We need to talk to patients about how much they drink,” Dr. Piano said. In addition, patients should be advised to closely monitor what they’re drinking.

“This definitely sharpens the focus of the importance of a thorough alcohol history when we see an atrial fibrillation patient and to counsel them to reduce or eliminate alcohol, even among those that don’t have alcohol use disorders,” Dr. Marcus said.

Preliminary results of the study were presented as a late-breaking clinical trials presentation at the American College of Cardiology meeting in May.

Dr. Marcus has received grants from Baylis, Jawbone, and Eight Sleep and has received personal fees from InCarda and Johnson & Johnson. Coauthors have received personal fees from VivaLNK, Huba Pharmaceuticals, Johnson & Johnson, and Merck and grants from Samsung and Amgen Inc. The editorialists have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Consuming alcohol increases the risk for an atrial fibrillation (AF) episode hours later, according to a study published online Aug. 30 in Annals of Internal Medicine. Modifying the drinking behavior of patients with a history of AF events could make a difference.

coldsnowstorm/iStock / Getty Images Plus

Past research has associated long-term alcohol consumption with the development of AF, and abstinence from alcohol has been associated with a lower overall AF burden. However, lead study author Greg Marcus, MD, a cardioelectrophysiolgist at the University of California, San Francisco, noted that many patients say that alcohol is a trigger for discrete AF episodes.

To test whether that was possible, the researchers enrolled 100 patients who had a history of AF events and who consumed at least one drink per month. Participants wore a transdermal alcohol sensor and an ambulatory, single-lead electrocardiogram device for 4 weeks. They were instructed to press a button on the electrocardiogram device each time they consumed a standard alcoholic beverage. In addition, blood samples were tested for phosphatidylethanol (PEth) at the participants’ 2-week and 4-week visits. PEth is a phospholipid formed in the blood after alcohol intake. It remains in the blood for up to 4 weeks after alcohol consumption.

The study findings confirmed what the patients had reported. The odds of an AF episode were 38% greater with every 0.1% increase in peak blood alcohol concentration over the previous 12 hours (odds ratio [OR], 1.38; 95% confidence interval, 1.04-1.83; P = .024). Moreover, an episode of AF was associated with twofold greater odds (OR, 2.02; 95% CI, 1.38-3.17) of having consumed one alcoholic drink in the past 4 hours. It was associated with more than threefold greater odds of having consumed two or more drinks (OR, 3.58; 95% CI, 1.63-7.89).

“The major takeaway is, among atrial fibrillation patients, consuming alcohol substantially heightened their risk for any given atrial fibrillation event in the subsequent few hours,” Dr. Marcus said. “The more alcohol consumed, the higher that risk.”

The acute effect of alcohol on these arrhythmias also means that modifying alcohol consumption could immediately benefit some patients. “These data combined with other evidence suggest that recommending minimizing or completely eliminating alcohol will likely be helpful to them,” Dr. Marcus said.

The study’s reliance on wearables and sensors was impressive, said Mariann R. Piano, PhD, director of the Center for Research Development and Scholarship, Vanderbilt University, Nashville, Tenn. Often, these types of studies are “self-reported and confounded by recall bias,” she said. But this study passively documented arrhythmia events and blood alcohol level without any patient input. The additional measures of alcohol consumption were used to validate the blood alcohol sensor.

The study’s focus on patients with a history of AF highlighted a high-risk patient group, according to Dr. Piano, who coauthored an editorial about the study. However, the findings may not be applicable to the general population.

Dr. Marcus said alcohol’s role in causing these types of arrhythmias is probably a matter of degree. AF patients are more prone to events than is the general population and are therefore more sensitive to alcohol, he said. But excessive alcohol consumption could increase the chance of AF in the general population.

The study is not without its limitations, however. For instance, “it would have been really ideal if we knew what that blood alcohol was” before an episode, Dr. Piano said. The number of drinks is a good start, but two drinks can affect persons differently, depending on their weight and height. Also, baseline PEth values suggest that patients had been drinking before the study, she said. Ideally, patients could have been asked to abstain from alcohol for a period before the study to determine a negative baseline PEth value and minimize the effects of previous drinking on AF episodes.

Moving forward, this research should inform how clinicians care for their AF patients, both experts agree. “We need to talk to patients about how much they drink,” Dr. Piano said. In addition, patients should be advised to closely monitor what they’re drinking.

“This definitely sharpens the focus of the importance of a thorough alcohol history when we see an atrial fibrillation patient and to counsel them to reduce or eliminate alcohol, even among those that don’t have alcohol use disorders,” Dr. Marcus said.

Preliminary results of the study were presented as a late-breaking clinical trials presentation at the American College of Cardiology meeting in May.

Dr. Marcus has received grants from Baylis, Jawbone, and Eight Sleep and has received personal fees from InCarda and Johnson & Johnson. Coauthors have received personal fees from VivaLNK, Huba Pharmaceuticals, Johnson & Johnson, and Merck and grants from Samsung and Amgen Inc. The editorialists have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Consuming alcohol increases the risk for an atrial fibrillation (AF) episode hours later, according to a study published online Aug. 30 in Annals of Internal Medicine. Modifying the drinking behavior of patients with a history of AF events could make a difference.

coldsnowstorm/iStock / Getty Images Plus

Past research has associated long-term alcohol consumption with the development of AF, and abstinence from alcohol has been associated with a lower overall AF burden. However, lead study author Greg Marcus, MD, a cardioelectrophysiolgist at the University of California, San Francisco, noted that many patients say that alcohol is a trigger for discrete AF episodes.

To test whether that was possible, the researchers enrolled 100 patients who had a history of AF events and who consumed at least one drink per month. Participants wore a transdermal alcohol sensor and an ambulatory, single-lead electrocardiogram device for 4 weeks. They were instructed to press a button on the electrocardiogram device each time they consumed a standard alcoholic beverage. In addition, blood samples were tested for phosphatidylethanol (PEth) at the participants’ 2-week and 4-week visits. PEth is a phospholipid formed in the blood after alcohol intake. It remains in the blood for up to 4 weeks after alcohol consumption.

The study findings confirmed what the patients had reported. The odds of an AF episode were 38% greater with every 0.1% increase in peak blood alcohol concentration over the previous 12 hours (odds ratio [OR], 1.38; 95% confidence interval, 1.04-1.83; P = .024). Moreover, an episode of AF was associated with twofold greater odds (OR, 2.02; 95% CI, 1.38-3.17) of having consumed one alcoholic drink in the past 4 hours. It was associated with more than threefold greater odds of having consumed two or more drinks (OR, 3.58; 95% CI, 1.63-7.89).

“The major takeaway is, among atrial fibrillation patients, consuming alcohol substantially heightened their risk for any given atrial fibrillation event in the subsequent few hours,” Dr. Marcus said. “The more alcohol consumed, the higher that risk.”

The acute effect of alcohol on these arrhythmias also means that modifying alcohol consumption could immediately benefit some patients. “These data combined with other evidence suggest that recommending minimizing or completely eliminating alcohol will likely be helpful to them,” Dr. Marcus said.

The study’s reliance on wearables and sensors was impressive, said Mariann R. Piano, PhD, director of the Center for Research Development and Scholarship, Vanderbilt University, Nashville, Tenn. Often, these types of studies are “self-reported and confounded by recall bias,” she said. But this study passively documented arrhythmia events and blood alcohol level without any patient input. The additional measures of alcohol consumption were used to validate the blood alcohol sensor.

The study’s focus on patients with a history of AF highlighted a high-risk patient group, according to Dr. Piano, who coauthored an editorial about the study. However, the findings may not be applicable to the general population.

Dr. Marcus said alcohol’s role in causing these types of arrhythmias is probably a matter of degree. AF patients are more prone to events than is the general population and are therefore more sensitive to alcohol, he said. But excessive alcohol consumption could increase the chance of AF in the general population.

The study is not without its limitations, however. For instance, “it would have been really ideal if we knew what that blood alcohol was” before an episode, Dr. Piano said. The number of drinks is a good start, but two drinks can affect persons differently, depending on their weight and height. Also, baseline PEth values suggest that patients had been drinking before the study, she said. Ideally, patients could have been asked to abstain from alcohol for a period before the study to determine a negative baseline PEth value and minimize the effects of previous drinking on AF episodes.

Moving forward, this research should inform how clinicians care for their AF patients, both experts agree. “We need to talk to patients about how much they drink,” Dr. Piano said. In addition, patients should be advised to closely monitor what they’re drinking.

“This definitely sharpens the focus of the importance of a thorough alcohol history when we see an atrial fibrillation patient and to counsel them to reduce or eliminate alcohol, even among those that don’t have alcohol use disorders,” Dr. Marcus said.

Preliminary results of the study were presented as a late-breaking clinical trials presentation at the American College of Cardiology meeting in May.

Dr. Marcus has received grants from Baylis, Jawbone, and Eight Sleep and has received personal fees from InCarda and Johnson & Johnson. Coauthors have received personal fees from VivaLNK, Huba Pharmaceuticals, Johnson & Johnson, and Merck and grants from Samsung and Amgen Inc. The editorialists have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Carotid artery stenting (CAS) and carotid endarterectomy (CEA) provided comparable outcomes over time in asymptomatic patients receiving good medical therapy in the largest trial to date of what to do with severe carotid artery narrowing that is yet to cause a stroke.

aaM Photography, Ltd./iStock

Among more than 3,600 patients, stenting and surgery performed by experienced physicians involved a 1.0% risk for causing disabling stroke or death within 30 days.

The annual rate of fatal or disabling strokes was about 0.5% with either procedure over an average 5 years’ follow-up – essentially halving the annual stroke risk had neither procedure been performed, according to Alison Halliday, MD, principal investigator of the Asymptomatic Carotid Surgery Trial-2 (ACST-2).

The results were reported Aug. 29 in a Hot Line session at the virtual annual congress of the European Society of Cardiology and published simultaneously online in The Lancet.

Session chair Gilles Montalescot, MD, Sorbonne University, Paris, noted that ACST-2 doubled the number of randomly assigned patients with asymptomatic carotid stenosis studied in previous trials, “so, a huge contribution to the evidence base in this field and apparently good news for both revascularization techniques.”
 

Thirty-day and 5-year outcomes

The trial was conducted in 33 countries between January 2008 and December 2020, enrolling 3,625 patients (70% were male; mean age, 70 years) with carotid stenosis of at least 60% on ultrasonography, in whom stenting or surgery was suitable but both the doctor and patient were “substantially uncertain” which procedure to prefer.

Among the 1,811 patients assigned to stenting, 87% underwent the procedure at a median of 14 days; 6% crossed over to surgery, typically because of a highly calcified lesion or a more tortuous carotid than anticipated; and 6% had no intervention.

Among the 1,814 patients assigned to surgery, 92% had the procedure at a median of 14 days; 3% crossed over to stenting, typically because of patient or doctor preference or reluctance to undergo general anesthesia; and 4% had no intervention.

Patients without complications who had stenting stayed on average 1 day less than did those undergoing surgery.

During an earlier press briefing, Dr. Halliday highlighted the need for procedural competency and said doctors had to submit a record of their CEA or CAS experience and, consistent with current guidelines, had to demonstrate an independently verified stroke or death rate of 6% or less for symptomatic patients and 3% or lower for asymptomatic patients.

The results showed the 30-day risk for death, myocardial infarction (MI), or any stroke was 3.9% with carotid stenting and 3.2% with surgery (P = .26).

But with stenting, there was a slightly higher risk for procedural nondisabling strokes (48 vs. 29; P = .03), including 15 strokes vs. 5 strokes, respectively, that left patients with no residual symptoms. This is “consistent with large, recent nationally representative registry data,” observed Dr. Halliday, of the University of Oxford (England).

For those undergoing surgery, cranial nerve palsies were reported in 5.4% vs. no patients undergoing stenting.

At 5 years, the nonprocedural fatal or disabling stroke rate was 2.5% in each group (rate ratio [RR], 0.98; P = .91), with any nonprocedural stroke occurring in 5.3% of patients with stenting vs. 4.5% with surgery (RR, 1.16; P = .33).

The investigators performed a meta-analysis combining the ACST-2 results with those of eight prior trials (four in asymptomatic and four in symptomatic patients) that yielded a similar nonsignificant result for any nonprocedural stroke (RR, 1.11; P = .21).

Based on the results from ACST-2 plus the major trials, stenting and surgery involve “similar risks and similar benefits,” Dr. Halliday concluded.

Discussant Marco Roffi, MD, University Hospital of Geneva, said, “In centers with documented expertise, carotid artery stenting should be offered as an alternative to carotid endarterectomy in patients with asymptomatic stenosis and suitable anatomy.”

While the trial provides “good news” for patients, he pointed out that a reduction in the sample size from 5,000 to 3,625 limited the statistical power and that enrollment over a long period of time may have introduced confounders, such as changes in equipment technique, and medical therapy.

Also, many centers enrolled few patients, raising the concern over low-volume centers and operators, Dr. Roffi said. “We know that 8% of the centers enrolled 39% of the patients,” and “information on the credentialing and experience of the interventionalists was limited.”

Further, a lack of systematic MI assessment may have favored the surgery group, and more recent developments in stenting with the potential of reducing periprocedural stroke were rarely used, such as proximal emboli protection in only 15% and double-layer stents in 11%.

Friedhelm Beyersdorf, MD, University Hospital of Freiburg, Germany, said that, as a vascular surgeon, he finds it understandable that there might be a higher incidence of nonfatal strokes when treating carotid stenosis with stents, given the vulnerability of these lesions.

“Nevertheless, the main conclusion from the entire study is that carotid artery treatment is extremely safe, it has to be done in order to avoid strokes, and, obviously, there seems to be an advantage for surgery in terms of nondisabling stroke,” he said.

Session chair Dr. Montalescot, however, said that what the study cannot address – and what was the subject of many online audience comments – is whether either intervention should be performed in these patients. 

Unlike earlier trials comparing interventions to medical therapy, Dr. Halliday said ACST-2 enrolled patients for whom the decision had been made that revascularization was needed. In addition, 99%-100% were receiving antithrombotic therapy at baseline, 85%-90% were receiving antihypertensives, and about 85% were taking statins.

Longer-term follow-up should provide a better picture of the nonprocedural stroke risk, with patients asked annually about exactly what medications and doses they are taking, she said.

“We will have an enormous list of exactly what’s gone on and the intensity of that therapy, which is, of course, much more intense than when we carried out our first trial. But these were people in whom a procedure was thought to be necessary,” she noted.

When asked during the press conference which procedure she would choose, Dr. Halliday, a surgeon, observed that patient preference is important but that the nature of the lesion itself often determines the optimal choice.

“If you know the competence of the people doing it is equal, then the less invasive procedure – providing it has good long-term viability, and that’s why we’re following for 10 years – is the more important,” she added.

The study was funded by the UK Medical Research Council and Health Technology Assessment Programme. Dr. Halliday reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Carotid artery stenting (CAS) and carotid endarterectomy (CEA) provided comparable outcomes over time in asymptomatic patients receiving good medical therapy in the largest trial to date of what to do with severe carotid artery narrowing that is yet to cause a stroke.

aaM Photography, Ltd./iStock

Among more than 3,600 patients, stenting and surgery performed by experienced physicians involved a 1.0% risk for causing disabling stroke or death within 30 days.

The annual rate of fatal or disabling strokes was about 0.5% with either procedure over an average 5 years’ follow-up – essentially halving the annual stroke risk had neither procedure been performed, according to Alison Halliday, MD, principal investigator of the Asymptomatic Carotid Surgery Trial-2 (ACST-2).

The results were reported Aug. 29 in a Hot Line session at the virtual annual congress of the European Society of Cardiology and published simultaneously online in The Lancet.

Session chair Gilles Montalescot, MD, Sorbonne University, Paris, noted that ACST-2 doubled the number of randomly assigned patients with asymptomatic carotid stenosis studied in previous trials, “so, a huge contribution to the evidence base in this field and apparently good news for both revascularization techniques.”
 

Thirty-day and 5-year outcomes

The trial was conducted in 33 countries between January 2008 and December 2020, enrolling 3,625 patients (70% were male; mean age, 70 years) with carotid stenosis of at least 60% on ultrasonography, in whom stenting or surgery was suitable but both the doctor and patient were “substantially uncertain” which procedure to prefer.

Among the 1,811 patients assigned to stenting, 87% underwent the procedure at a median of 14 days; 6% crossed over to surgery, typically because of a highly calcified lesion or a more tortuous carotid than anticipated; and 6% had no intervention.

Among the 1,814 patients assigned to surgery, 92% had the procedure at a median of 14 days; 3% crossed over to stenting, typically because of patient or doctor preference or reluctance to undergo general anesthesia; and 4% had no intervention.

Patients without complications who had stenting stayed on average 1 day less than did those undergoing surgery.

During an earlier press briefing, Dr. Halliday highlighted the need for procedural competency and said doctors had to submit a record of their CEA or CAS experience and, consistent with current guidelines, had to demonstrate an independently verified stroke or death rate of 6% or less for symptomatic patients and 3% or lower for asymptomatic patients.

The results showed the 30-day risk for death, myocardial infarction (MI), or any stroke was 3.9% with carotid stenting and 3.2% with surgery (P = .26).

But with stenting, there was a slightly higher risk for procedural nondisabling strokes (48 vs. 29; P = .03), including 15 strokes vs. 5 strokes, respectively, that left patients with no residual symptoms. This is “consistent with large, recent nationally representative registry data,” observed Dr. Halliday, of the University of Oxford (England).

For those undergoing surgery, cranial nerve palsies were reported in 5.4% vs. no patients undergoing stenting.

At 5 years, the nonprocedural fatal or disabling stroke rate was 2.5% in each group (rate ratio [RR], 0.98; P = .91), with any nonprocedural stroke occurring in 5.3% of patients with stenting vs. 4.5% with surgery (RR, 1.16; P = .33).

The investigators performed a meta-analysis combining the ACST-2 results with those of eight prior trials (four in asymptomatic and four in symptomatic patients) that yielded a similar nonsignificant result for any nonprocedural stroke (RR, 1.11; P = .21).

Based on the results from ACST-2 plus the major trials, stenting and surgery involve “similar risks and similar benefits,” Dr. Halliday concluded.

Discussant Marco Roffi, MD, University Hospital of Geneva, said, “In centers with documented expertise, carotid artery stenting should be offered as an alternative to carotid endarterectomy in patients with asymptomatic stenosis and suitable anatomy.”

While the trial provides “good news” for patients, he pointed out that a reduction in the sample size from 5,000 to 3,625 limited the statistical power and that enrollment over a long period of time may have introduced confounders, such as changes in equipment technique, and medical therapy.

Also, many centers enrolled few patients, raising the concern over low-volume centers and operators, Dr. Roffi said. “We know that 8% of the centers enrolled 39% of the patients,” and “information on the credentialing and experience of the interventionalists was limited.”

Further, a lack of systematic MI assessment may have favored the surgery group, and more recent developments in stenting with the potential of reducing periprocedural stroke were rarely used, such as proximal emboli protection in only 15% and double-layer stents in 11%.

Friedhelm Beyersdorf, MD, University Hospital of Freiburg, Germany, said that, as a vascular surgeon, he finds it understandable that there might be a higher incidence of nonfatal strokes when treating carotid stenosis with stents, given the vulnerability of these lesions.

“Nevertheless, the main conclusion from the entire study is that carotid artery treatment is extremely safe, it has to be done in order to avoid strokes, and, obviously, there seems to be an advantage for surgery in terms of nondisabling stroke,” he said.

Session chair Dr. Montalescot, however, said that what the study cannot address – and what was the subject of many online audience comments – is whether either intervention should be performed in these patients. 

Unlike earlier trials comparing interventions to medical therapy, Dr. Halliday said ACST-2 enrolled patients for whom the decision had been made that revascularization was needed. In addition, 99%-100% were receiving antithrombotic therapy at baseline, 85%-90% were receiving antihypertensives, and about 85% were taking statins.

Longer-term follow-up should provide a better picture of the nonprocedural stroke risk, with patients asked annually about exactly what medications and doses they are taking, she said.

“We will have an enormous list of exactly what’s gone on and the intensity of that therapy, which is, of course, much more intense than when we carried out our first trial. But these were people in whom a procedure was thought to be necessary,” she noted.

When asked during the press conference which procedure she would choose, Dr. Halliday, a surgeon, observed that patient preference is important but that the nature of the lesion itself often determines the optimal choice.

“If you know the competence of the people doing it is equal, then the less invasive procedure – providing it has good long-term viability, and that’s why we’re following for 10 years – is the more important,” she added.

The study was funded by the UK Medical Research Council and Health Technology Assessment Programme. Dr. Halliday reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Carotid artery stenting (CAS) and carotid endarterectomy (CEA) provided comparable outcomes over time in asymptomatic patients receiving good medical therapy in the largest trial to date of what to do with severe carotid artery narrowing that is yet to cause a stroke.

aaM Photography, Ltd./iStock

Among more than 3,600 patients, stenting and surgery performed by experienced physicians involved a 1.0% risk for causing disabling stroke or death within 30 days.

The annual rate of fatal or disabling strokes was about 0.5% with either procedure over an average 5 years’ follow-up – essentially halving the annual stroke risk had neither procedure been performed, according to Alison Halliday, MD, principal investigator of the Asymptomatic Carotid Surgery Trial-2 (ACST-2).

The results were reported Aug. 29 in a Hot Line session at the virtual annual congress of the European Society of Cardiology and published simultaneously online in The Lancet.

Session chair Gilles Montalescot, MD, Sorbonne University, Paris, noted that ACST-2 doubled the number of randomly assigned patients with asymptomatic carotid stenosis studied in previous trials, “so, a huge contribution to the evidence base in this field and apparently good news for both revascularization techniques.”
 

Thirty-day and 5-year outcomes

The trial was conducted in 33 countries between January 2008 and December 2020, enrolling 3,625 patients (70% were male; mean age, 70 years) with carotid stenosis of at least 60% on ultrasonography, in whom stenting or surgery was suitable but both the doctor and patient were “substantially uncertain” which procedure to prefer.

Among the 1,811 patients assigned to stenting, 87% underwent the procedure at a median of 14 days; 6% crossed over to surgery, typically because of a highly calcified lesion or a more tortuous carotid than anticipated; and 6% had no intervention.

Among the 1,814 patients assigned to surgery, 92% had the procedure at a median of 14 days; 3% crossed over to stenting, typically because of patient or doctor preference or reluctance to undergo general anesthesia; and 4% had no intervention.

Patients without complications who had stenting stayed on average 1 day less than did those undergoing surgery.

During an earlier press briefing, Dr. Halliday highlighted the need for procedural competency and said doctors had to submit a record of their CEA or CAS experience and, consistent with current guidelines, had to demonstrate an independently verified stroke or death rate of 6% or less for symptomatic patients and 3% or lower for asymptomatic patients.

The results showed the 30-day risk for death, myocardial infarction (MI), or any stroke was 3.9% with carotid stenting and 3.2% with surgery (P = .26).

But with stenting, there was a slightly higher risk for procedural nondisabling strokes (48 vs. 29; P = .03), including 15 strokes vs. 5 strokes, respectively, that left patients with no residual symptoms. This is “consistent with large, recent nationally representative registry data,” observed Dr. Halliday, of the University of Oxford (England).

For those undergoing surgery, cranial nerve palsies were reported in 5.4% vs. no patients undergoing stenting.

At 5 years, the nonprocedural fatal or disabling stroke rate was 2.5% in each group (rate ratio [RR], 0.98; P = .91), with any nonprocedural stroke occurring in 5.3% of patients with stenting vs. 4.5% with surgery (RR, 1.16; P = .33).

The investigators performed a meta-analysis combining the ACST-2 results with those of eight prior trials (four in asymptomatic and four in symptomatic patients) that yielded a similar nonsignificant result for any nonprocedural stroke (RR, 1.11; P = .21).

Based on the results from ACST-2 plus the major trials, stenting and surgery involve “similar risks and similar benefits,” Dr. Halliday concluded.

Discussant Marco Roffi, MD, University Hospital of Geneva, said, “In centers with documented expertise, carotid artery stenting should be offered as an alternative to carotid endarterectomy in patients with asymptomatic stenosis and suitable anatomy.”

While the trial provides “good news” for patients, he pointed out that a reduction in the sample size from 5,000 to 3,625 limited the statistical power and that enrollment over a long period of time may have introduced confounders, such as changes in equipment technique, and medical therapy.

Also, many centers enrolled few patients, raising the concern over low-volume centers and operators, Dr. Roffi said. “We know that 8% of the centers enrolled 39% of the patients,” and “information on the credentialing and experience of the interventionalists was limited.”

Further, a lack of systematic MI assessment may have favored the surgery group, and more recent developments in stenting with the potential of reducing periprocedural stroke were rarely used, such as proximal emboli protection in only 15% and double-layer stents in 11%.

Friedhelm Beyersdorf, MD, University Hospital of Freiburg, Germany, said that, as a vascular surgeon, he finds it understandable that there might be a higher incidence of nonfatal strokes when treating carotid stenosis with stents, given the vulnerability of these lesions.

“Nevertheless, the main conclusion from the entire study is that carotid artery treatment is extremely safe, it has to be done in order to avoid strokes, and, obviously, there seems to be an advantage for surgery in terms of nondisabling stroke,” he said.

Session chair Dr. Montalescot, however, said that what the study cannot address – and what was the subject of many online audience comments – is whether either intervention should be performed in these patients. 

Unlike earlier trials comparing interventions to medical therapy, Dr. Halliday said ACST-2 enrolled patients for whom the decision had been made that revascularization was needed. In addition, 99%-100% were receiving antithrombotic therapy at baseline, 85%-90% were receiving antihypertensives, and about 85% were taking statins.

Longer-term follow-up should provide a better picture of the nonprocedural stroke risk, with patients asked annually about exactly what medications and doses they are taking, she said.

“We will have an enormous list of exactly what’s gone on and the intensity of that therapy, which is, of course, much more intense than when we carried out our first trial. But these were people in whom a procedure was thought to be necessary,” she noted.

When asked during the press conference which procedure she would choose, Dr. Halliday, a surgeon, observed that patient preference is important but that the nature of the lesion itself often determines the optimal choice.

“If you know the competence of the people doing it is equal, then the less invasive procedure – providing it has good long-term viability, and that’s why we’re following for 10 years – is the more important,” she added.

The study was funded by the UK Medical Research Council and Health Technology Assessment Programme. Dr. Halliday reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

A protocol of immediate angiography provided no mortality benefit over a strategy or delayed or more selective angiography among patients resuscitated from out-of-hospital cardiac arrest and without ST-segment elevation, new randomized results show.

Cathy Yeulet/thinkstock

“Among patients with resuscitated out-of-hospital cardiac arrest of possible cardiac origin, with shockable and nonshockable arrest rhythm and no ST-elevation, a strategy of immediate, unselected coronary angiography was not found to be beneficial over a delayed and selective approach with regard to the 30-day risk of all-cause death,” concluded principal investigator Steffen Desch, MD, University of Leipzig (Germany) Heart Center.

The results support previous results of the Coronary Angiography after Cardiac Arrest (COACT) trial, in patients with shockable rhythms, which also showed no differences in clinical outcomes between immediate and delayed coronary angiography at both 90 days and 1 year, he noted.  

“What the clinicians wanted to know is, is it really necessary to get up at 3 a.m. in the morning to perform a coronary angiography on these patients, and that’s certainly out,” Dr. Desch said in an interview. “So, there’s really no room for this strategy anymore. You can take your time and wait a day or 2.”

These findings, from the TOMAHAWK trial, were presented Aug. 29 at the annual congress of the European Society of Cardiology and simultaneously published online in the New England Journal of Medicine.
 

Larger group without ST-segment elevation

Prognosis after out-of-hospital cardiac arrest is extremely poor, with an overall survival rate of less than 10%, Dr. Desch noted. “Actually, only 20% make it to the hospital; the vast majority of these patients die out in the field, so there’s really a great need in improving treatment.”

Acute coronary syndrome accounts for up to 60% of out-of-hospital arrests in which a cardiac cause has been identified, the authors wrote in their report. ST-segment elevation on postresuscitation electrocardiography “has good positive predictive value” for acute coronary lesions triggering the arrest, but in the far larger subgroup of patients without ST-segment elevation, “the spectrum of underlying causes is considerably broader and includes both cardiac and noncardiac causes.”

In patients with myocardial infarction, early revascularization would prevent negative consequences of myocardial injury, but unselected early coronary angiography would put patients not having an MI at unnecessary risk for procedural complications or delay in the diagnosis of the actual cause of their arrest, they noted. 

In this trial, the researchers randomly assigned 554 patients from 31 sites in Germany and Denmark who were successfully resuscitated after cardiac arrest of possible cardiac origin to immediate transfer for coronary angiography or to initial intensive care assessment with delayed or selective angiography after a minimum delay of at least 1 day.

In the end, the average delay in this arm was 2 days, Dr. Desch noted. If the clinical course indicated that a coronary cause was unlikely, angiography might not be performed at all in this group.  

No patient had ST-segment elevation on postresuscitation electrocardiography. The primary endpoint was death from any cause at 30 days; secondary end points were death from any cause or severe neurologic deficit at 30 days.

Results showed that 95% of patients in the immediate angiography group actually underwent the procedure, compared with 62% of those in the delayed group, a finding that was “logical” given the study design, he said.

At 30 days, 54% of patients in the immediate angiography group and 46% in the delayed group had died, a nonsignificant difference (P = .06). Because the researchers had performed an interim analysis, Dr. Desch explained, the final P value for significance in this trial was not .05, but rather .034, to account for multiple comparisons.

The secondary end point of death from any cause or severe neurologic deficit at 30 days “was actually nominally significant in favor of the delayed group,” he said. “So, this is not corrected for multiple testing, it’s just a hypothesis that’s in the room, but it’s certainly worthy of discussion that the immediate strategy might actually cause harm.”

There was no difference between the groups in peak release of myocardial enzymes, or any other safety end points, including bleeding, stroke, or renal failure, Dr. Desch said.

Further analyses showed no large differences between subgroups, including age, diabetes, first monitored rhythm, confirmed MI as the trigger of the arrest, sex, and the time from cardiac arrest to the return of spontaneous circulation, he noted.
 

Opportunity to minimize harm

Discussant for the results during the presentation was Susanna Price, MBBS, PhD, Royal Brompton Hospital, London.

Dr. Price concluded: “What this means for me, is it gives me information that’s useful regarding the opportunity to minimize harm, which is a lot of what critical care is about, so we don’t necessarily now have to move these patients very acutely when they’ve just come in through the ED [emergency department]. It has implications for resource utilization, but also implications for mobilizing patients around the hospital during COVID-19.”

It’s also important to note that coronary angiography was still carried out in certain patients, “so we still have to have that dialogue with our interventional cardiologists for certain patients who may need to go to the cath lab, and what it should now allow us to do is give appropriate focus to how to manage these patients when they come in to the ED or to our ICUs [intensive care units],” she said.

Dr. Price added, though, that perhaps “the most important slide” in the presentation was that showing 90% of these patients had a witnessed cardiac arrest, “and yet a third of these patients, 168 of them, had no bystander CPR at all.” 

She pointed to the “chain of survival” after cardiac arrest, of which Charles D. Deakin, MD, University Hospital Southampton (England), wrote that “not all links are equal.”

“Early recognition and calling for help, early CPR, early defibrillation where appropriate are very, very important, and we need to be addressing all of these, as well as what happens in the cath lab and after admission,” Dr. Price said.

This research was funded by the German Center for Cardiovascular Research. Dr. Desch and Dr. Price reported no relevant disclosures.

A version of this article first appeared on Medscape.com.

A protocol of immediate angiography provided no mortality benefit over a strategy or delayed or more selective angiography among patients resuscitated from out-of-hospital cardiac arrest and without ST-segment elevation, new randomized results show.

Cathy Yeulet/thinkstock

“Among patients with resuscitated out-of-hospital cardiac arrest of possible cardiac origin, with shockable and nonshockable arrest rhythm and no ST-elevation, a strategy of immediate, unselected coronary angiography was not found to be beneficial over a delayed and selective approach with regard to the 30-day risk of all-cause death,” concluded principal investigator Steffen Desch, MD, University of Leipzig (Germany) Heart Center.

The results support previous results of the Coronary Angiography after Cardiac Arrest (COACT) trial, in patients with shockable rhythms, which also showed no differences in clinical outcomes between immediate and delayed coronary angiography at both 90 days and 1 year, he noted.  

“What the clinicians wanted to know is, is it really necessary to get up at 3 a.m. in the morning to perform a coronary angiography on these patients, and that’s certainly out,” Dr. Desch said in an interview. “So, there’s really no room for this strategy anymore. You can take your time and wait a day or 2.”

These findings, from the TOMAHAWK trial, were presented Aug. 29 at the annual congress of the European Society of Cardiology and simultaneously published online in the New England Journal of Medicine.
 

Larger group without ST-segment elevation

Prognosis after out-of-hospital cardiac arrest is extremely poor, with an overall survival rate of less than 10%, Dr. Desch noted. “Actually, only 20% make it to the hospital; the vast majority of these patients die out in the field, so there’s really a great need in improving treatment.”

Acute coronary syndrome accounts for up to 60% of out-of-hospital arrests in which a cardiac cause has been identified, the authors wrote in their report. ST-segment elevation on postresuscitation electrocardiography “has good positive predictive value” for acute coronary lesions triggering the arrest, but in the far larger subgroup of patients without ST-segment elevation, “the spectrum of underlying causes is considerably broader and includes both cardiac and noncardiac causes.”

In patients with myocardial infarction, early revascularization would prevent negative consequences of myocardial injury, but unselected early coronary angiography would put patients not having an MI at unnecessary risk for procedural complications or delay in the diagnosis of the actual cause of their arrest, they noted. 

In this trial, the researchers randomly assigned 554 patients from 31 sites in Germany and Denmark who were successfully resuscitated after cardiac arrest of possible cardiac origin to immediate transfer for coronary angiography or to initial intensive care assessment with delayed or selective angiography after a minimum delay of at least 1 day.

In the end, the average delay in this arm was 2 days, Dr. Desch noted. If the clinical course indicated that a coronary cause was unlikely, angiography might not be performed at all in this group.  

No patient had ST-segment elevation on postresuscitation electrocardiography. The primary endpoint was death from any cause at 30 days; secondary end points were death from any cause or severe neurologic deficit at 30 days.

Results showed that 95% of patients in the immediate angiography group actually underwent the procedure, compared with 62% of those in the delayed group, a finding that was “logical” given the study design, he said.

At 30 days, 54% of patients in the immediate angiography group and 46% in the delayed group had died, a nonsignificant difference (P = .06). Because the researchers had performed an interim analysis, Dr. Desch explained, the final P value for significance in this trial was not .05, but rather .034, to account for multiple comparisons.

The secondary end point of death from any cause or severe neurologic deficit at 30 days “was actually nominally significant in favor of the delayed group,” he said. “So, this is not corrected for multiple testing, it’s just a hypothesis that’s in the room, but it’s certainly worthy of discussion that the immediate strategy might actually cause harm.”

There was no difference between the groups in peak release of myocardial enzymes, or any other safety end points, including bleeding, stroke, or renal failure, Dr. Desch said.

Further analyses showed no large differences between subgroups, including age, diabetes, first monitored rhythm, confirmed MI as the trigger of the arrest, sex, and the time from cardiac arrest to the return of spontaneous circulation, he noted.
 

Opportunity to minimize harm

Discussant for the results during the presentation was Susanna Price, MBBS, PhD, Royal Brompton Hospital, London.

Dr. Price concluded: “What this means for me, is it gives me information that’s useful regarding the opportunity to minimize harm, which is a lot of what critical care is about, so we don’t necessarily now have to move these patients very acutely when they’ve just come in through the ED [emergency department]. It has implications for resource utilization, but also implications for mobilizing patients around the hospital during COVID-19.”

It’s also important to note that coronary angiography was still carried out in certain patients, “so we still have to have that dialogue with our interventional cardiologists for certain patients who may need to go to the cath lab, and what it should now allow us to do is give appropriate focus to how to manage these patients when they come in to the ED or to our ICUs [intensive care units],” she said.

Dr. Price added, though, that perhaps “the most important slide” in the presentation was that showing 90% of these patients had a witnessed cardiac arrest, “and yet a third of these patients, 168 of them, had no bystander CPR at all.” 

She pointed to the “chain of survival” after cardiac arrest, of which Charles D. Deakin, MD, University Hospital Southampton (England), wrote that “not all links are equal.”

“Early recognition and calling for help, early CPR, early defibrillation where appropriate are very, very important, and we need to be addressing all of these, as well as what happens in the cath lab and after admission,” Dr. Price said.

This research was funded by the German Center for Cardiovascular Research. Dr. Desch and Dr. Price reported no relevant disclosures.

A version of this article first appeared on Medscape.com.

A protocol of immediate angiography provided no mortality benefit over a strategy or delayed or more selective angiography among patients resuscitated from out-of-hospital cardiac arrest and without ST-segment elevation, new randomized results show.

Cathy Yeulet/thinkstock

“Among patients with resuscitated out-of-hospital cardiac arrest of possible cardiac origin, with shockable and nonshockable arrest rhythm and no ST-elevation, a strategy of immediate, unselected coronary angiography was not found to be beneficial over a delayed and selective approach with regard to the 30-day risk of all-cause death,” concluded principal investigator Steffen Desch, MD, University of Leipzig (Germany) Heart Center.

The results support previous results of the Coronary Angiography after Cardiac Arrest (COACT) trial, in patients with shockable rhythms, which also showed no differences in clinical outcomes between immediate and delayed coronary angiography at both 90 days and 1 year, he noted.  

“What the clinicians wanted to know is, is it really necessary to get up at 3 a.m. in the morning to perform a coronary angiography on these patients, and that’s certainly out,” Dr. Desch said in an interview. “So, there’s really no room for this strategy anymore. You can take your time and wait a day or 2.”

These findings, from the TOMAHAWK trial, were presented Aug. 29 at the annual congress of the European Society of Cardiology and simultaneously published online in the New England Journal of Medicine.
 

Larger group without ST-segment elevation

Prognosis after out-of-hospital cardiac arrest is extremely poor, with an overall survival rate of less than 10%, Dr. Desch noted. “Actually, only 20% make it to the hospital; the vast majority of these patients die out in the field, so there’s really a great need in improving treatment.”

Acute coronary syndrome accounts for up to 60% of out-of-hospital arrests in which a cardiac cause has been identified, the authors wrote in their report. ST-segment elevation on postresuscitation electrocardiography “has good positive predictive value” for acute coronary lesions triggering the arrest, but in the far larger subgroup of patients without ST-segment elevation, “the spectrum of underlying causes is considerably broader and includes both cardiac and noncardiac causes.”

In patients with myocardial infarction, early revascularization would prevent negative consequences of myocardial injury, but unselected early coronary angiography would put patients not having an MI at unnecessary risk for procedural complications or delay in the diagnosis of the actual cause of their arrest, they noted. 

In this trial, the researchers randomly assigned 554 patients from 31 sites in Germany and Denmark who were successfully resuscitated after cardiac arrest of possible cardiac origin to immediate transfer for coronary angiography or to initial intensive care assessment with delayed or selective angiography after a minimum delay of at least 1 day.

In the end, the average delay in this arm was 2 days, Dr. Desch noted. If the clinical course indicated that a coronary cause was unlikely, angiography might not be performed at all in this group.  

No patient had ST-segment elevation on postresuscitation electrocardiography. The primary endpoint was death from any cause at 30 days; secondary end points were death from any cause or severe neurologic deficit at 30 days.

Results showed that 95% of patients in the immediate angiography group actually underwent the procedure, compared with 62% of those in the delayed group, a finding that was “logical” given the study design, he said.

At 30 days, 54% of patients in the immediate angiography group and 46% in the delayed group had died, a nonsignificant difference (P = .06). Because the researchers had performed an interim analysis, Dr. Desch explained, the final P value for significance in this trial was not .05, but rather .034, to account for multiple comparisons.

The secondary end point of death from any cause or severe neurologic deficit at 30 days “was actually nominally significant in favor of the delayed group,” he said. “So, this is not corrected for multiple testing, it’s just a hypothesis that’s in the room, but it’s certainly worthy of discussion that the immediate strategy might actually cause harm.”

There was no difference between the groups in peak release of myocardial enzymes, or any other safety end points, including bleeding, stroke, or renal failure, Dr. Desch said.

Further analyses showed no large differences between subgroups, including age, diabetes, first monitored rhythm, confirmed MI as the trigger of the arrest, sex, and the time from cardiac arrest to the return of spontaneous circulation, he noted.
 

Opportunity to minimize harm

Discussant for the results during the presentation was Susanna Price, MBBS, PhD, Royal Brompton Hospital, London.

Dr. Price concluded: “What this means for me, is it gives me information that’s useful regarding the opportunity to minimize harm, which is a lot of what critical care is about, so we don’t necessarily now have to move these patients very acutely when they’ve just come in through the ED [emergency department]. It has implications for resource utilization, but also implications for mobilizing patients around the hospital during COVID-19.”

It’s also important to note that coronary angiography was still carried out in certain patients, “so we still have to have that dialogue with our interventional cardiologists for certain patients who may need to go to the cath lab, and what it should now allow us to do is give appropriate focus to how to manage these patients when they come in to the ED or to our ICUs [intensive care units],” she said.

Dr. Price added, though, that perhaps “the most important slide” in the presentation was that showing 90% of these patients had a witnessed cardiac arrest, “and yet a third of these patients, 168 of them, had no bystander CPR at all.” 

She pointed to the “chain of survival” after cardiac arrest, of which Charles D. Deakin, MD, University Hospital Southampton (England), wrote that “not all links are equal.”

“Early recognition and calling for help, early CPR, early defibrillation where appropriate are very, very important, and we need to be addressing all of these, as well as what happens in the cath lab and after admission,” Dr. Price said.

This research was funded by the German Center for Cardiovascular Research. Dr. Desch and Dr. Price reported no relevant disclosures.

A version of this article first appeared on Medscape.com.

The first global trial to compare the cardiovascular (CV) safety of two therapies for prostate cancer proved inconclusive because of inadequate enrollment and events, but the study is a harbinger of growth in the emerging specialty of cardio-oncology, according to experts.

European Society of Cardiology

“Many new cancer agents have extended patient survival, yet some of these agents have significant potential cardiovascular toxicity,” said Renato D. Lopes, MD, in presenting a study at the annual congress of the European Society of Cardiology.

In the context of improving survival in patients with or at risk for both cancer and cardiovascular disease, he suggested that the prostate cancer study he led could be “a model for interdisciplinary collaboration” needed to address the relative and sometimes competing risks of these disease states.

This point was seconded by several pioneers in cardio-oncology who participated in the discussion of the results of the trial, called PRONOUNCE.

“We know many drugs in oncology increase cardiovascular risk, so these are the types of trials we need,” according Thomas M. Suter, MD, who leads the cardio-oncology service at the University Hospital, Berne, Switzerland. He was the ESC-invited discussant for PRONOUNCE.
 

More than 100 centers in 12 countries involved

In PRONOUNCE, 545 patients with prostate cancer and established atherosclerotic cardiovascular disease were randomized to degarelix, a gonadotropin-releasing hormone antagonist, or leuprolide, a GnRH agonist. The patients were enrolled at 113 participating centers in 12 countries. All of the patients had an indication for an androgen-deprivation therapy (ADT).

In numerous previous studies, “ADT has been associated with higher CV morbidity and mortality, particularly in men with preexisting CV disease,” explained Dr. Lopes, but the relative cardiovascular safety of GnRH agonists relative to GnRH antagonists has been “controversial.”

The PRONOUNCE study was designed to resolve this issue, but the study was terminated early because of slow enrollment (not related to the COVID-19 pandemic). The planned enrollment was 900 patients.

In addition, the rate of major adverse cardiovascular events (MACE), defined as myocardial infarction, stroke, or death, was lower over the course of follow-up than anticipated in the study design.
 

No significant difference on primary endpoint

At the end of 12 months, MACE occurred in 11 (4.1%) of patients randomized to leuprolide and 15 (5.5%) of those randomized to degarelix. The greater hazard ratio for MACE in the degarelix group did not approach statistical significance (hazard ratio, 1.28; P = .53).

As a result, the question of the relative CV safety of these drugs “remains unresolved,” according to Dr. Lopes, professor of medicine at Duke University Medical Center, Durham, N.C.

This does not diminish the need to answer this question. In the addition to the fact that cancer is a malignancy primarily of advancing age when CV disease is prevalent – the mean age in this study was 73 years and 44% were over age 75 – it is often an indolent disease with long periods of survival, according to Dr. Lopes. About half of prostate cancer patients have concomitant CV disease, and about half will receive ADT at some point in their treatment.

In patients receiving ADT, leuprolide is far more commonly used than GnRH antagonists, which are offered in only about 4% of patients, according to data cited by Dr. Lopes. The underlying hypothesis of this study was that leuprolide is associated with greater CV risk, which might have been relevant to a risk-benefit calculation, if the hypothesis had been confirmed.
 

Cancer drugs can increase CV risk

Based on experimental data, “there is concern the leuprolide is involved in plaque destabilization,” said Dr. Lopes, but he noted that ADTs in general are associated with adverse metabolic changes, including increases in LDL cholesterol, insulin resistance, and body fat, all of which could be relevant to CV risk.

It is the improving rates of survival for prostate cancer as well for other types of cancer that have increased attention to the potential for cancer drugs to increase CV risk, another major cause of early mortality. For these competing risks, objective data are needed to evaluate a relative risk-to-benefit ratio for treatment choices.

This dilemma led the ESC to recently establish its Council on Cardio-Oncology, and many centers around the world are also creating interdisciplinary groups to guide treatment choices for patients with both diseases.

“You will certainly get a lot of referrals,” said Rudolf de Boer, MD, professor of translational cardiology, University Medical Center, Groningen, Netherlands. Basing his remark on his own experience starting a cardio-oncology clinic at his institution, he called this work challenging and agreed that the need for objective data is urgent.

“We need data to provide common ground on which to judge relative risks,” Dr. de Boer said. He also praised the PRONOUNCE investigators for their efforts even if the data failed to answer the question posed.

The PRONOUNCE results were published online in Circulation at the time of Dr. Lopes’s presentation.

The study received funding from Ferring Pharmaceuticals. Dr. Lopes reports financial relationships with Bristol-Myers Squibb, GlaxoSmithKline, Medtronic, Pfizer, and Sanofi. Dr. Suter reports financial relationships with Boehringer Ingelheim, GlaxoSmithKline, and Roche. Dr. de Boer reports financial relationships with AstraZeneca, Abbott, Bristol-Myers Squibb, Novartis, Novo Nordisk, and Roche.

The first global trial to compare the cardiovascular (CV) safety of two therapies for prostate cancer proved inconclusive because of inadequate enrollment and events, but the study is a harbinger of growth in the emerging specialty of cardio-oncology, according to experts.

European Society of Cardiology

“Many new cancer agents have extended patient survival, yet some of these agents have significant potential cardiovascular toxicity,” said Renato D. Lopes, MD, in presenting a study at the annual congress of the European Society of Cardiology.

In the context of improving survival in patients with or at risk for both cancer and cardiovascular disease, he suggested that the prostate cancer study he led could be “a model for interdisciplinary collaboration” needed to address the relative and sometimes competing risks of these disease states.

This point was seconded by several pioneers in cardio-oncology who participated in the discussion of the results of the trial, called PRONOUNCE.

“We know many drugs in oncology increase cardiovascular risk, so these are the types of trials we need,” according Thomas M. Suter, MD, who leads the cardio-oncology service at the University Hospital, Berne, Switzerland. He was the ESC-invited discussant for PRONOUNCE.
 

More than 100 centers in 12 countries involved

In PRONOUNCE, 545 patients with prostate cancer and established atherosclerotic cardiovascular disease were randomized to degarelix, a gonadotropin-releasing hormone antagonist, or leuprolide, a GnRH agonist. The patients were enrolled at 113 participating centers in 12 countries. All of the patients had an indication for an androgen-deprivation therapy (ADT).

In numerous previous studies, “ADT has been associated with higher CV morbidity and mortality, particularly in men with preexisting CV disease,” explained Dr. Lopes, but the relative cardiovascular safety of GnRH agonists relative to GnRH antagonists has been “controversial.”

The PRONOUNCE study was designed to resolve this issue, but the study was terminated early because of slow enrollment (not related to the COVID-19 pandemic). The planned enrollment was 900 patients.

In addition, the rate of major adverse cardiovascular events (MACE), defined as myocardial infarction, stroke, or death, was lower over the course of follow-up than anticipated in the study design.
 

No significant difference on primary endpoint

At the end of 12 months, MACE occurred in 11 (4.1%) of patients randomized to leuprolide and 15 (5.5%) of those randomized to degarelix. The greater hazard ratio for MACE in the degarelix group did not approach statistical significance (hazard ratio, 1.28; P = .53).

As a result, the question of the relative CV safety of these drugs “remains unresolved,” according to Dr. Lopes, professor of medicine at Duke University Medical Center, Durham, N.C.

This does not diminish the need to answer this question. In the addition to the fact that cancer is a malignancy primarily of advancing age when CV disease is prevalent – the mean age in this study was 73 years and 44% were over age 75 – it is often an indolent disease with long periods of survival, according to Dr. Lopes. About half of prostate cancer patients have concomitant CV disease, and about half will receive ADT at some point in their treatment.

In patients receiving ADT, leuprolide is far more commonly used than GnRH antagonists, which are offered in only about 4% of patients, according to data cited by Dr. Lopes. The underlying hypothesis of this study was that leuprolide is associated with greater CV risk, which might have been relevant to a risk-benefit calculation, if the hypothesis had been confirmed.
 

Cancer drugs can increase CV risk

Based on experimental data, “there is concern the leuprolide is involved in plaque destabilization,” said Dr. Lopes, but he noted that ADTs in general are associated with adverse metabolic changes, including increases in LDL cholesterol, insulin resistance, and body fat, all of which could be relevant to CV risk.

It is the improving rates of survival for prostate cancer as well for other types of cancer that have increased attention to the potential for cancer drugs to increase CV risk, another major cause of early mortality. For these competing risks, objective data are needed to evaluate a relative risk-to-benefit ratio for treatment choices.

This dilemma led the ESC to recently establish its Council on Cardio-Oncology, and many centers around the world are also creating interdisciplinary groups to guide treatment choices for patients with both diseases.

“You will certainly get a lot of referrals,” said Rudolf de Boer, MD, professor of translational cardiology, University Medical Center, Groningen, Netherlands. Basing his remark on his own experience starting a cardio-oncology clinic at his institution, he called this work challenging and agreed that the need for objective data is urgent.

“We need data to provide common ground on which to judge relative risks,” Dr. de Boer said. He also praised the PRONOUNCE investigators for their efforts even if the data failed to answer the question posed.

The PRONOUNCE results were published online in Circulation at the time of Dr. Lopes’s presentation.

The study received funding from Ferring Pharmaceuticals. Dr. Lopes reports financial relationships with Bristol-Myers Squibb, GlaxoSmithKline, Medtronic, Pfizer, and Sanofi. Dr. Suter reports financial relationships with Boehringer Ingelheim, GlaxoSmithKline, and Roche. Dr. de Boer reports financial relationships with AstraZeneca, Abbott, Bristol-Myers Squibb, Novartis, Novo Nordisk, and Roche.

The first global trial to compare the cardiovascular (CV) safety of two therapies for prostate cancer proved inconclusive because of inadequate enrollment and events, but the study is a harbinger of growth in the emerging specialty of cardio-oncology, according to experts.

European Society of Cardiology

“Many new cancer agents have extended patient survival, yet some of these agents have significant potential cardiovascular toxicity,” said Renato D. Lopes, MD, in presenting a study at the annual congress of the European Society of Cardiology.

In the context of improving survival in patients with or at risk for both cancer and cardiovascular disease, he suggested that the prostate cancer study he led could be “a model for interdisciplinary collaboration” needed to address the relative and sometimes competing risks of these disease states.

This point was seconded by several pioneers in cardio-oncology who participated in the discussion of the results of the trial, called PRONOUNCE.

“We know many drugs in oncology increase cardiovascular risk, so these are the types of trials we need,” according Thomas M. Suter, MD, who leads the cardio-oncology service at the University Hospital, Berne, Switzerland. He was the ESC-invited discussant for PRONOUNCE.
 

More than 100 centers in 12 countries involved

In PRONOUNCE, 545 patients with prostate cancer and established atherosclerotic cardiovascular disease were randomized to degarelix, a gonadotropin-releasing hormone antagonist, or leuprolide, a GnRH agonist. The patients were enrolled at 113 participating centers in 12 countries. All of the patients had an indication for an androgen-deprivation therapy (ADT).

In numerous previous studies, “ADT has been associated with higher CV morbidity and mortality, particularly in men with preexisting CV disease,” explained Dr. Lopes, but the relative cardiovascular safety of GnRH agonists relative to GnRH antagonists has been “controversial.”

The PRONOUNCE study was designed to resolve this issue, but the study was terminated early because of slow enrollment (not related to the COVID-19 pandemic). The planned enrollment was 900 patients.

In addition, the rate of major adverse cardiovascular events (MACE), defined as myocardial infarction, stroke, or death, was lower over the course of follow-up than anticipated in the study design.
 

No significant difference on primary endpoint

At the end of 12 months, MACE occurred in 11 (4.1%) of patients randomized to leuprolide and 15 (5.5%) of those randomized to degarelix. The greater hazard ratio for MACE in the degarelix group did not approach statistical significance (hazard ratio, 1.28; P = .53).

As a result, the question of the relative CV safety of these drugs “remains unresolved,” according to Dr. Lopes, professor of medicine at Duke University Medical Center, Durham, N.C.

This does not diminish the need to answer this question. In the addition to the fact that cancer is a malignancy primarily of advancing age when CV disease is prevalent – the mean age in this study was 73 years and 44% were over age 75 – it is often an indolent disease with long periods of survival, according to Dr. Lopes. About half of prostate cancer patients have concomitant CV disease, and about half will receive ADT at some point in their treatment.

In patients receiving ADT, leuprolide is far more commonly used than GnRH antagonists, which are offered in only about 4% of patients, according to data cited by Dr. Lopes. The underlying hypothesis of this study was that leuprolide is associated with greater CV risk, which might have been relevant to a risk-benefit calculation, if the hypothesis had been confirmed.
 

Cancer drugs can increase CV risk

Based on experimental data, “there is concern the leuprolide is involved in plaque destabilization,” said Dr. Lopes, but he noted that ADTs in general are associated with adverse metabolic changes, including increases in LDL cholesterol, insulin resistance, and body fat, all of which could be relevant to CV risk.

It is the improving rates of survival for prostate cancer as well for other types of cancer that have increased attention to the potential for cancer drugs to increase CV risk, another major cause of early mortality. For these competing risks, objective data are needed to evaluate a relative risk-to-benefit ratio for treatment choices.

This dilemma led the ESC to recently establish its Council on Cardio-Oncology, and many centers around the world are also creating interdisciplinary groups to guide treatment choices for patients with both diseases.

“You will certainly get a lot of referrals,” said Rudolf de Boer, MD, professor of translational cardiology, University Medical Center, Groningen, Netherlands. Basing his remark on his own experience starting a cardio-oncology clinic at his institution, he called this work challenging and agreed that the need for objective data is urgent.

“We need data to provide common ground on which to judge relative risks,” Dr. de Boer said. He also praised the PRONOUNCE investigators for their efforts even if the data failed to answer the question posed.

The PRONOUNCE results were published online in Circulation at the time of Dr. Lopes’s presentation.

The study received funding from Ferring Pharmaceuticals. Dr. Lopes reports financial relationships with Bristol-Myers Squibb, GlaxoSmithKline, Medtronic, Pfizer, and Sanofi. Dr. Suter reports financial relationships with Boehringer Ingelheim, GlaxoSmithKline, and Roche. Dr. de Boer reports financial relationships with AstraZeneca, Abbott, Bristol-Myers Squibb, Novartis, Novo Nordisk, and Roche.

Healthy elderly people who ate a walnut-supplemented diet for 2 years showed significant reductions in LDL cholesterol, according to a randomized study that used imaging to evaluate lipid changes.

©rootstocks/Thinkstock

“Regularly eating walnuts will lower your LDL cholesterol and improve the quality of LDL particles, rendering them less prone to enter the arterial wall and build up atherosclerosis, and this will occur without unwanted weight gain in spite of the high-fat – healthy vegetable fat, though – content of walnuts,” Emilio Ros, MD, PhD, senior author of the Walnuts and Healthy Aging (WAHA) study, said in an interview.

WAHA is a parallel-group, randomized, controlled trial that followed 636 patients over 2 years at centers in Loma Linda, Calif., and Barcelona. They were randomly assigned to either a walnut-free or walnut-supplemented diet, and every 2 months they were underwent nuclear magnetic resonance spectroscopy and recorded their compliance, toleration, medication changes, and body weight.

The researchers reported “significantly decreased” total cholesterol, LDL cholesterol and intermediate-density lipoprotein cholesterol, along with reductions in total LDL cholesterol particles and small LDL cholesterol particle number in patients on a walnut-supplemented diet, compared with controls. However, triglycerides and HDL cholesterol were unaffected.

Study results

The study reported mean reductions in the following lipid categories among what the researchers called the “walnut group”:

• Total cholesterol, –8.5 mg/dL (95% confidence interval, –11.2 to –5.4), a 4.4% mean reduction.
• LDL-C, –4.3 mg/dL (95% CI, –6.6 to –1.6), a 3.6% reduction.
• Intermediate-density lipoprotein cholesterol, –1.3 mg/dL (95% CI, –1.5 to –1.0] for a 16.8% reduction.
• Total LDL cholesterol particles, a reduction of 4.3%.
• Small LDL cholesterol particle number, a 6.1% decrease.

“WAHA is the largest and longest randomized nut trial to date, which overcomes power limitations of former trials, smaller and of shorter duration,” said Dr. Ros, of the lipid clinic, endocrinology, nutrition service at the Hospital Clinic Villarroel at the University of Barcelona. He noted that studies he has participated in have already shown that the walnut-supplemented diet had beneficial effects on blood pressure, systemic inflammation and endothelial function.

Other strengths of the study, he said, were that it recruited patients from two distinct locations and that it retained 90% of participants over 2 years (the study started out with 708 participants).

Christie Ballantyne, MD, concurred that the size and duration of the study are worth noting. “People always have questions about what they should eat,” said Dr. Ballantyne, chief of cardiology at Baylor College of Medicine and director of cardiovascular disease prevention at Methodist DeBakey Heart Center, both in Houston, said in an interview. “It’s very difficult to do nutritional studies. Most studies are small and short term, so it’s unusual to have study that’s large with 2 years of follow-up. This is a larger-than-usual study.”

Potential study limitations

Dr. Ros did acknowledge some limitations of the study. Participants weren’t blinded, the feeding setting wasn’t controlled, and participants were generally healthy and had average normal lipid profiles because they were taking statins, which may explain the modest lipid improvements in the study. “LDL cholesterol lowering by nuts is related to baseline levels, hence the reduction observed in our study was modest,” he said.

Additionally, because the study group was elderly, the results don’t apply to younger people. “Yet,” Dr. Ros added, “we know from many prior studies that nuts in general and walnuts in particular will lower blood cholesterol regardless of age.”

Dr. Ballantyne noted that the use of nuclear magnetic resonance spectroscopy to evaluate lipid levels involves a methodology that isn’t as systematic or as standardized as the typical lipid profile, and that different systems use proprietary software to interpret results. “That’s a little bit of an issue,” he said. “What exactly do the numbers mean?”

Overall, though, Dr. Ballantyne said the study is a significant addition to the literature. “The study is large, well done, and it confirms the benefits of something we’ve been telling patients is a good choice. It’s useful because there’s so much noise. It is important because there’s tremendous confusion and misinformation about what’s really healthy to eat.”

The study was supported by a grant from the California Walnut Commission (CWC), from which Dr. Ros and two coauthors received research funding through their institutions. Dr. Ros also reported receiving compensation from CWC and serves on a CWC advisory council. The other authors have no relationships to disclose. The WAHA study was supported by a grant from the CWC, from which Dr. Ros and some coinvestigators have received research funding through their institutions. Dr. Ballantyne has no relevant relationships to disclose.

Healthy elderly people who ate a walnut-supplemented diet for 2 years showed significant reductions in LDL cholesterol, according to a randomized study that used imaging to evaluate lipid changes.

©rootstocks/Thinkstock

“Regularly eating walnuts will lower your LDL cholesterol and improve the quality of LDL particles, rendering them less prone to enter the arterial wall and build up atherosclerosis, and this will occur without unwanted weight gain in spite of the high-fat – healthy vegetable fat, though – content of walnuts,” Emilio Ros, MD, PhD, senior author of the Walnuts and Healthy Aging (WAHA) study, said in an interview.

WAHA is a parallel-group, randomized, controlled trial that followed 636 patients over 2 years at centers in Loma Linda, Calif., and Barcelona. They were randomly assigned to either a walnut-free or walnut-supplemented diet, and every 2 months they were underwent nuclear magnetic resonance spectroscopy and recorded their compliance, toleration, medication changes, and body weight.

The researchers reported “significantly decreased” total cholesterol, LDL cholesterol and intermediate-density lipoprotein cholesterol, along with reductions in total LDL cholesterol particles and small LDL cholesterol particle number in patients on a walnut-supplemented diet, compared with controls. However, triglycerides and HDL cholesterol were unaffected.

Study results

The study reported mean reductions in the following lipid categories among what the researchers called the “walnut group”:

• Total cholesterol, –8.5 mg/dL (95% confidence interval, –11.2 to –5.4), a 4.4% mean reduction.
• LDL-C, –4.3 mg/dL (95% CI, –6.6 to –1.6), a 3.6% reduction.
• Intermediate-density lipoprotein cholesterol, –1.3 mg/dL (95% CI, –1.5 to –1.0] for a 16.8% reduction.
• Total LDL cholesterol particles, a reduction of 4.3%.
• Small LDL cholesterol particle number, a 6.1% decrease.

“WAHA is the largest and longest randomized nut trial to date, which overcomes power limitations of former trials, smaller and of shorter duration,” said Dr. Ros, of the lipid clinic, endocrinology, nutrition service at the Hospital Clinic Villarroel at the University of Barcelona. He noted that studies he has participated in have already shown that the walnut-supplemented diet had beneficial effects on blood pressure, systemic inflammation and endothelial function.

Other strengths of the study, he said, were that it recruited patients from two distinct locations and that it retained 90% of participants over 2 years (the study started out with 708 participants).

Christie Ballantyne, MD, concurred that the size and duration of the study are worth noting. “People always have questions about what they should eat,” said Dr. Ballantyne, chief of cardiology at Baylor College of Medicine and director of cardiovascular disease prevention at Methodist DeBakey Heart Center, both in Houston, said in an interview. “It’s very difficult to do nutritional studies. Most studies are small and short term, so it’s unusual to have study that’s large with 2 years of follow-up. This is a larger-than-usual study.”

Potential study limitations

Dr. Ros did acknowledge some limitations of the study. Participants weren’t blinded, the feeding setting wasn’t controlled, and participants were generally healthy and had average normal lipid profiles because they were taking statins, which may explain the modest lipid improvements in the study. “LDL cholesterol lowering by nuts is related to baseline levels, hence the reduction observed in our study was modest,” he said.

Additionally, because the study group was elderly, the results don’t apply to younger people. “Yet,” Dr. Ros added, “we know from many prior studies that nuts in general and walnuts in particular will lower blood cholesterol regardless of age.”

Dr. Ballantyne noted that the use of nuclear magnetic resonance spectroscopy to evaluate lipid levels involves a methodology that isn’t as systematic or as standardized as the typical lipid profile, and that different systems use proprietary software to interpret results. “That’s a little bit of an issue,” he said. “What exactly do the numbers mean?”

Overall, though, Dr. Ballantyne said the study is a significant addition to the literature. “The study is large, well done, and it confirms the benefits of something we’ve been telling patients is a good choice. It’s useful because there’s so much noise. It is important because there’s tremendous confusion and misinformation about what’s really healthy to eat.”

The study was supported by a grant from the California Walnut Commission (CWC), from which Dr. Ros and two coauthors received research funding through their institutions. Dr. Ros also reported receiving compensation from CWC and serves on a CWC advisory council. The other authors have no relationships to disclose. The WAHA study was supported by a grant from the CWC, from which Dr. Ros and some coinvestigators have received research funding through their institutions. Dr. Ballantyne has no relevant relationships to disclose.

Healthy elderly people who ate a walnut-supplemented diet for 2 years showed significant reductions in LDL cholesterol, according to a randomized study that used imaging to evaluate lipid changes.

©rootstocks/Thinkstock

“Regularly eating walnuts will lower your LDL cholesterol and improve the quality of LDL particles, rendering them less prone to enter the arterial wall and build up atherosclerosis, and this will occur without unwanted weight gain in spite of the high-fat – healthy vegetable fat, though – content of walnuts,” Emilio Ros, MD, PhD, senior author of the Walnuts and Healthy Aging (WAHA) study, said in an interview.

WAHA is a parallel-group, randomized, controlled trial that followed 636 patients over 2 years at centers in Loma Linda, Calif., and Barcelona. They were randomly assigned to either a walnut-free or walnut-supplemented diet, and every 2 months they were underwent nuclear magnetic resonance spectroscopy and recorded their compliance, toleration, medication changes, and body weight.

The researchers reported “significantly decreased” total cholesterol, LDL cholesterol and intermediate-density lipoprotein cholesterol, along with reductions in total LDL cholesterol particles and small LDL cholesterol particle number in patients on a walnut-supplemented diet, compared with controls. However, triglycerides and HDL cholesterol were unaffected.

Study results

The study reported mean reductions in the following lipid categories among what the researchers called the “walnut group”:

• Total cholesterol, –8.5 mg/dL (95% confidence interval, –11.2 to –5.4), a 4.4% mean reduction.
• LDL-C, –4.3 mg/dL (95% CI, –6.6 to –1.6), a 3.6% reduction.
• Intermediate-density lipoprotein cholesterol, –1.3 mg/dL (95% CI, –1.5 to –1.0] for a 16.8% reduction.
• Total LDL cholesterol particles, a reduction of 4.3%.
• Small LDL cholesterol particle number, a 6.1% decrease.

“WAHA is the largest and longest randomized nut trial to date, which overcomes power limitations of former trials, smaller and of shorter duration,” said Dr. Ros, of the lipid clinic, endocrinology, nutrition service at the Hospital Clinic Villarroel at the University of Barcelona. He noted that studies he has participated in have already shown that the walnut-supplemented diet had beneficial effects on blood pressure, systemic inflammation and endothelial function.

Other strengths of the study, he said, were that it recruited patients from two distinct locations and that it retained 90% of participants over 2 years (the study started out with 708 participants).

Christie Ballantyne, MD, concurred that the size and duration of the study are worth noting. “People always have questions about what they should eat,” said Dr. Ballantyne, chief of cardiology at Baylor College of Medicine and director of cardiovascular disease prevention at Methodist DeBakey Heart Center, both in Houston, said in an interview. “It’s very difficult to do nutritional studies. Most studies are small and short term, so it’s unusual to have study that’s large with 2 years of follow-up. This is a larger-than-usual study.”

Potential study limitations

Dr. Ros did acknowledge some limitations of the study. Participants weren’t blinded, the feeding setting wasn’t controlled, and participants were generally healthy and had average normal lipid profiles because they were taking statins, which may explain the modest lipid improvements in the study. “LDL cholesterol lowering by nuts is related to baseline levels, hence the reduction observed in our study was modest,” he said.

Additionally, because the study group was elderly, the results don’t apply to younger people. “Yet,” Dr. Ros added, “we know from many prior studies that nuts in general and walnuts in particular will lower blood cholesterol regardless of age.”

Dr. Ballantyne noted that the use of nuclear magnetic resonance spectroscopy to evaluate lipid levels involves a methodology that isn’t as systematic or as standardized as the typical lipid profile, and that different systems use proprietary software to interpret results. “That’s a little bit of an issue,” he said. “What exactly do the numbers mean?”

Overall, though, Dr. Ballantyne said the study is a significant addition to the literature. “The study is large, well done, and it confirms the benefits of something we’ve been telling patients is a good choice. It’s useful because there’s so much noise. It is important because there’s tremendous confusion and misinformation about what’s really healthy to eat.”

The study was supported by a grant from the California Walnut Commission (CWC), from which Dr. Ros and two coauthors received research funding through their institutions. Dr. Ros also reported receiving compensation from CWC and serves on a CWC advisory council. The other authors have no relationships to disclose. The WAHA study was supported by a grant from the CWC, from which Dr. Ros and some coinvestigators have received research funding through their institutions. Dr. Ballantyne has no relevant relationships to disclose.