[Ventricular septation using two-patch technique for total inlet-trabecular septal defect].

A 3-year-old girl underwent ventriclar septation using 2 patch technique. Echocardiography at birth revealed single left ventricle with pulmonary hypertension. Pulmonary artery banding was performed at the age of 1 month. Echocardiography at the age of 3 years showed total inlet-trabecular septal defect. Ventricular septation was performed through the right atrium. The tendon of Todaro and the coronary sinus were in normal positions. Almost all of the inlet septum and trabecular septum were deficit, although the posterior median ridge was present. It was considered that the atrio-ventricular node was shifted inferiorly and the conduction system ran down the inlet septum as in the case of atrioventricular septal defect, since this patient had concordant atrioventricular( AV) connection. It was difficult to form the septum using a single patch because of complicated anatomy. Thus we decided to divide the patch in order to make smooth surface avoiding conduction injury. One patch was used for the trabecular defect using running sutures and another patch was used for the inlet defect using pledgeted mattress sutures. Eventually both patches were sutured together to close the defect. Regular sinus rhythm resumed, although 2:1 AV block appeared temporally. The patient was discharged at postoperative day 30 without any complication.