What does an irregular heartbeat have to do with stroke, where blood flow to the brain is blocked? As it turns out, atrial fibrillation can increase the risk of getting a stroke, and this risk increases as you get older. On the first part of our World Heart Day special, Consultant Electrophysiologist & Cardiologist, Datuk Dr Razali Omar, from Cardiac Vascular Sentral KL, shares how to prevent stroke if you have atrial fibrillation.