Coffee Consumption May Be Safe, Even Protective, for Those with Atrial Fibrillation
New research indicates that drinking caffeinated coffee is not harmful for individuals with atrial fibrillation (A-fib) and may even help prevent recurrence of the common heart disorder.
The findings, presented yesterday at the American Heart Association conference in New Orleans and published in JAMA, challenge long-held beliefs about caffeine’s impact on heart rhythm. The four-year DECAF (Does Eliminating Coffee Avoid Fibrillation?) study involved 200 regular coffee drinkers, aged 70 on average, across Australia, Canada, and the United States. Participants were randomized to either eliminate caffeine or continue consuming at least one cup daily. Researchers then tracked A-fib recurrence using electrocardiograms, wearable monitors, and implantable devices.
The study revealed that 47% of those who continued drinking coffee experienced a recurrence of atrial flutter (a related condition), compared to 64% in the no-coffee group, with coffee drinkers also experiencing a longer time before their first episode. “I was somewhat surprised at the magnitude of how protective caffeinated coffee does seem to be to prevent atrial fibrillation,” said Dr. Gregory Marcus, a cardiologist at the University of California, San Francisco, who led the study. This research could lead to a shift in how doctors counsel patients about dietary habits and heart health. Dr. Johanna Contreras, a cardiologist at Mount Sinai Fuster Heart Hospital, noted that “drinking a cup of coffee a day seems to be perfectly safe for people with A-fib.” You can learn more about atrial fibrillation from the American Heart Association.
Researchers cautioned that the study’s findings may not apply to individuals currently experiencing an A-fib episode and emphasized the importance of moderation. The potential benefits may stem from anti-inflammatory compounds in coffee or caffeine’s effect on the adrenaline response, but further investigation is needed. The study did not account for variations in exercise or diet, which could also play a role in heart health.
Officials stated that further research will focus on identifying the specific mechanisms behind coffee’s potential protective effects and determining optimal consumption levels for individuals with A-fib.
