India, Nov. 18 -- Your first cup of coffee in the morning, right after waking up, could be doing you more good than harm. The morning brew is often criticised for inducing anxiety or a regular heartbeat if taken on an empty stomach. But what is the actual truth?

Dr Jeremy London, a US cardiovascular surgeon with over 25 years of clinical experience, in an Instagram post shared on November 17, examined the medical advice to avoid coffee and caffeine for patients with atrial fibrillation, a recommendation based on the belief that it would irritate the heart rhythm.

For the uninitiated, atrial fibrillation is a common type of irregular and often rapid heartbeat where the upper chambers of the heart quiver instead of contracting normally. H...