Coffee may help protect against A-fib, the most common irregular heartbeat, study finds

Drinking caffeinated coffee is safe for people with atrial fibrillation and may help protect against recurrence of the disorder, a new study finds.

More than 10 million Americans live with atrial fibrillation, or A-fib, a common heart disorder that causes heart palpitations and can lead to heart failure, blood clots and stroke. Doctors have long tried to understand whether caffeine — which can increase heart rate and blood pressure — appears to trigger episodes that feel like a fluttering or thumping in the chest and cause dizziness or breathlessness.

“There is no standard advice for atrial fibrillation and caffeine,” said Dr. Gregory Marcus, a cardiologist and professor of medicine at the University of California, San Francisco, who led the DECAF (Does Eliminating Coffee Avoid Fibril