Left Ventricular Outflow Tract Obstruction Due to an Aneurysm of the Membranous Septum in a Patient with Pulmonary Atresia and Ventricular Septum Defect - Gase Report - Di Benedetto, G; Crupi, G C; Villani, M; Abbruzzese, P; Parenzan, L; Pacifico, A D (The Thoracic and Cardiovascular Surgeon, 1980)