What Is Atrial Fibrillation?

Atrial fibrillation (AF) is a common type of arrhythmia, or irregular heart rhythm, that occurs when the electrical signals in the upper chambers of the heart (the atria) become disorganized. Instead of beating in a regular, coordinated way, the atria quiver or “fibrillate,” which can disrupt the normal flow of blood through the heart.

Key Features of Atrial Fibrillation:

• Irregular and often rapid heartbeat
• The atria beat out of sync with the ventricles (lower chambers)
• May occur occasionally (paroxysmal), be persistent, or become permanent

(Reference: American Heart Association, https://www.heart.org/en/health-topics/atrial-fibrillation/what-is-atrial-fibrillation-afib-or-af)