Single origin of right and left pulmonary arteries from ascending aorta, with main pulmonary artery from right ventricle.

A previously undescribed anomaly is presented in which right and left pulmonary arteries arise via a single vessel from the ascending aorta while the main pulmonary artery arises normally from the right ventricle. This main pulmonary artery has no branches supplying the lungs and connects via a ductus arteriosus to the descending aorta. Additional anomalies were an atrial septal defect and tubular hypoplasia of the aortic isthmus.