What is Atrial Fibrillation (AF)?

Atrial fibrillation (AF), also known as AFib, is the most common type of heart rhythm disorder or arrhythmia. AF affects the upper chambers of the heart (atria) and is caused by a problem with the heart’s electrical signals that coordinate the muscles of the atria. With AF, the atria quiver rapidly and cause the heart to beat in an irregular manner instead of a normal, rhythmic pattern. Symptoms of AF can include an irregular heart beat, feeling tired, dizzy, short of breath, and not having enough energy.
AF affects more than 2.5 million American adults and 4.5 million people living in the European Union, and accounts for approximately one-third of hospitalizations for cardiac rhythm disturbances.

Below is a video from The Heart Rhythm Society for patients and caregivers on Atrial Fibrillation.