The left ventricle, ascending aorta, and aortic and mitral valves are hypoplastic; an atrial septal defect and a large patent ductus arteriosus are also present.

AO = aorta; IVC = inferior vena cava; LA = left atrium; LV = left ventricle; PA = pulmonary artery; PDA = patent ductus arteriosus; PV = pulmonary veins; RA = right atrium; RV = right ventricle; SVC = superior vena cava.