Anterolateral muscle bundle of the left ventricle in atrioventricular septal defect: Left ventricular outflow tract and subaortic stenosis

Abstract
The anatomy of the left ventricular outflow tract (LVOT) in 77 hearts with atrioventricular septal defect (AVSD), 36 with a separate AV orifice and 41 with a common AV-orifice, were investigated.