The purpose of this study was to determine the cardiac anatomy of patients with double-outlet right ventricle by angiocardiography. A total of 73 patients between the ages of one day and ii years were examined. The aorta was on the right side of the pulmonary artery in 23 cases (32%), right anterior in 20 (27%) and right posterior in 17 cases (23%). pulmonary stenosis was found In 53 patients (73%) and subaortic stenosis In six cases. Ventricular septal defect (VSD) war subaortic In 39 cases (52%), remote type in 17 (23%), doubly committed In 10 (13%), and subpulmonic in 9 (12%). Double VSD war noted in two patients. pulmonary hypertension was more frequent in subpulmonic ventricular septet detect (78%). The most common associated anomalies were atrial septal defect (34%), anomalous coronary arteries (12%) and endocardial cushion defect (10%). Aortic root angiography war not satisfactory in hen of the cases with coronary arterial anomaly. In conclusion, double-outlet right ventricle is a complex anomaly, all of whose cardiac features can be successfully demonstrated in detail by echocardiography and angiocardiography. However, in order to determine the anatomy of the coronary arteries, selective coronary angiography may be necessary in some patients.