Mindy Prouty, a certified nurse practitioner, shares signs and symptoms of AFib. Sponsored by Virginia Mason Franciscan Health.

correctionA previous photo with this article showed an electrocardiogram of normal sinus rhythm, not atrial fibrillation. This version has been corrected. When considering problems with the heart, you ...

Atrial fibrillation, also known as AFib, is an irregular heartbeat, or arrhythmia that happens when the upper chambers of the heart (the atria) are out of sync with the lower chambers and beating ...