Atrial fibrillation (AFib) is a condition that causes your heart to beat in an irregular rhythm. One way to classify AFib is by what’s causing it. Valvular AFib and nonvalvular AFib are terms used to ...

Valvular atrial fibrillation (A-fib) involves a condition that leads to an irregular or abnormal heart rhythm. This can increase a person’s risk of cardiovascular complications, such as stroke.

Atrial fibrillation (AF) is characterized by rapid and irregular activation of the atrium, for example, 400–600 pulses of the atrium muscular wall per minute in humans. The occurrence of AF increases ...

Atrial fibrillation (A-fib) is a type of arrhythmia, or irregular heartbeat. It often causes the heart to beat unusually fast. The three main types of atrial fibrillation are: paroxysmal, persistent, ...

Atrial fibrillation occurs and maintains itself in the context of a morphologically and functionally altered atrial substrate that can be induced by stressors such as underlying diseases (cardiac or ...