File:PMC4900353 ACA-19-293-g002.png

English: F2: Diagrammatic representation of Warden repair: (a) Reveals two partial anomalous pulmonary venous connections to superior vena cava and presence of atrial septal defect. (b) The Warden procedure is depicted. The superior vena cava is transected above the level of uppermost opening of the partial anomalous pulmonary venous connections, and the transected end of the lower part of the superior vena cava is closed with sutures. Then, the flow through the lower end of the superior vena cava is rerouted to the left atrium using a pericardial patch. The right atrial appendage is constructed into a tubular structure and anastomosed to the upper stump of the superior vena cava. RA: Right atrium, LA: Left atrium, RV: Right ventricle, LV: Left ventricle, PA: Pulmonary artery, AO: Aorta, RAA: Right atrial appendage, PAPVCs: Partial anomalous pulmonary venous connection