A case of congenital diverticulum of the left ventricle associated with a secundum atrial-septal defect occurred. The child also had persistent frequent premature ventricular extrasystoles. After resection of the diverticulum and repair of the atrial-septal defect, a junctional rhythm supervened. The ventricular arrhythmia gradually reappeared several days after surgery.
Norton JB, Kohler CM, Rao MM, Dooley BN, Cuello L. Congenital Diverticulum of the Left Ventricle. Am J Dis Child. 1973;126(5):702–704. doi:10.1001/archpedi.1973.02110190564023