Figure 39: Frontal view of a heart after an atriopulmonary Fontan operation. A conduit (C) was used to join the right atrium (RA) and the pulmonary arteries. The right (RPA) and left (LPA) branches are seen arising from the junction with the conduit. The aorta (Ao) is anterior and leftward in this heart with Double Inlet Left Ventricle (DILV). There is a calcified patch (P) on the right AV valve to prevent flow of venous blood from the RA into the systemic ventricle.