Congenital left ventricular diverticulum.

Cardiac diverticula are rare and may have a wide spectrum of presentation ranging from an acute rupture and life threatening arrhythmias to being completely asymptomatic. The treatment options may vary but in view of their life threatening potential, the consensus is towards treating them early when the diagnosis was made. We present a case of an infant who presented in an emergency with cardiac arrest and was ultimately treated successfully on cardiopulmonary bypass and made an uneventful recovery. The literature has also been discussed on left ventricular diverticulum.