Atrial fibrillation, often called AFib or AF, is the most common type of treated heart arrhythmia . An arrhythmia is when the heart beats too slowly, too fast, or in an irregular way.
Atrial fibrillation, often called AFib or AF, is the most common type of treated heart arrhythmia . An arrhythmia is when the heart beats too slowly, too fast, or in an irregular way.