Atrial Fibrillation (AF) is the most common sustained heart rhythm abnormality. It affects nearly 5 million people in the United States.AF is an irregular and often rapid heartbeat that can cause poor blood flow to the body.During AF, the upper chambers of the heart (Atria) begin to quiver and beat chaotically-out of synch with the lower chambers of the heart (Ventricles).Some of the more common signs of AF include palpitations, shortness of breath, dizziness and fatigue.With the help of your healthcare team, AF can be treated.Andrew Brenyo MD is here to discuss AF, its diagnoses and treatments.