Repair of left superior vena cava entering the left atrium.

Connection of an anomalous left superior vena cava to the left atrium is an uncommon lesion that is usually associated with other complex intracardiac malformations. A technique for diverting the anomalous caval return along the left atrial roof and into the right atrium is presented. This simple tunnel method avoids potential obstruction to systemic and pulmonary venous return and leaves viable atrial tissue comprising the majority of the new pathway. The technique and results in 7 patients are described.