Incidence and management of dysrhythmias after Fontan procedure.

The modified Fontan procedure for univentricular heart disease results in the full spectrum of significant cardiac arrhythmias: tachycardias and bradycardias. The tachycardias are primarily supraventricular in origin: 1. atrial flutter, 2. primary atrial tachycardia, 3. atrial fibrillation, and 4. accelerated junctional rhythm or junctional tachycardia; however, ventricular tachyarrhythmias occur also, but less frequently. Bradycardia usually is...