Wednesday December 13, 2006
Back to basic !


The reentrant circuits in Atrial Fibrillation usually arise from.......... (choose one)

A) Right Atrium

B) Left Atrium



Answer: Left Atrium.

As SA Node lies in right atrium, there is a general misconception that atrial fibrillation arise in right atrium but usually the abnormal foci is in left atrium near the entrance of pulmonary veins. In Maze procedure, the ablation path surrounds the pumonary veins (click on images to see their web link).