Diverticulum of the right ventricle associated with pulmonary stenosis, rhabdomyoma and Wolff-Parkinson-White syndrome.

Congenital cardiac diverticulum is a rare anomaly that may present as an isolated lesion or in association with other malformations. Diverticulum of the left ventricle is more common than that of the right ventricle. We report a case of cardiac diverticulum over the right ventricular outflow tract and associated pulmonary stenosis, right atrial rhabdomyoma, and Wolff-Parkinson-White syndrome in a 9-month-old boy. The delta wave disappeared after removal of the atrial rhabdomyoma.