Normal Sinus Rhythm vs AFib/ AF❤️📈📉 Atrial Fibrillation (AF) is a common and serious heart arrhythmia accounting for one in three strokes. This happens because the abnormal heart rhythm poses the risk of blood clots forming inside the heart. When clots break off they usually travel to the brain, causing severe strokes. About 10 percent of ischemic strokes are caused by AF, that is first detected at the time of stroke. Asymptomatic AF which underlies these strokes is not uncommon and can be eas