[A case of straddling tricuspid valve associated with VSD]

A case of straddling tricuspid valve associated with VSD was presented, who was diagnosed as VSD with pulmonary hypertension but not diagnosed as straddling in preoperative state. Two-dimensional echocardiography did not demonstrate a small right ventricle and overriding of tricuspid valve to the ventricular septum. Operative findings were as follows; the VSD was common A-V canal type and anomalous chordae of septal leaflet of tricuspid valve crossed through the VSD and attached to the contralateral side of the ventricular septum. We tried to preserve the anomalous chordae to prevent tricuspid regurgitation, so that we carried out patch closure of VSD. To avoid injury conduction system stitches were placed from upper margin of the VSD, and to keep away tricuspid regurgitation we plicated a depression of septal leaflet which caused by anomalous chordae in VSD patch closure. In postoperative state, A-V block did not arise and tricuspid regurgitation was shown a little as well as preoperative state.