What Causes Atrial Fibrillation?

Atrial fibrillation (AF) occurs when the electrical signals traveling through the heart are conducted abnormally and become disorganized and very rapid.

This is the result of damage to the heart’s electrical system. This damage is most often the result of other conditions, such as coronary artery disease or high blood pressure, that affect the health of the heart. Sometimes, the cause of AF is unknown.