Glossary of Terms
Atrial fibrillation (also called AF or A Fib) is an arrhythmia characterized as irregular, disorganized, electrical activity of the upper chambers (atria) of the heart. The atria quiver instead of regularly beating which causes them to move around 300-600 times a minute (instead of 60-80 times a minute). Because the upper chambers are quivering so rapidly, the blood is not allowed to completely empty and causes pooling in the atria. More on Atrial Fibrillation...
Related terms: SA Node, AV Node, Natural Pacemaker, Pulmonary Vein Ablation / Pulmonary Vein Antrum Isolation (PVAI)