Diverticulosis of the left ventricle.

Nine patients, 4--60 years old, had single or multiple left ventricular outpouchings, best seen during diastole, and believed to represent congenital diverticula. The 14 diverticula, 5--28 mm long, were either along the diaphragmatic or anterior ventricular wall. Only one patient had his diverticulum surgically removed; the wall was lined by thick endocardium surrounded by normal myocardium. The lesions did not produce local or systemic complications. All patients had normal chest radiographs. The material suggests that left ventricular diverticula not associated with midline anomalies are perhaps not very rare and should be distinguished from cardiac aneurysm.