Results
The mean cardiopulmonary bypass time was 128±73.9 min(34~563 min). The mean aortic occlusion time was 86.5±46.3 min (18~255 min). There were 5 cases of operative death, 4 cases of type I, 1 cases of type IV, all of which were combined with LSVC.
Severe postoperative complications mainly included severe lung infection, perfusion lung, diaphragmatic paralysis and anuria in 4 cases. In addition, 1 case of type I UCSS with RSVC deficiency and transitional endocardial cushion defect was treated with pericardial piece to establish an internal tunnel to drain LSVC. The avulsion of pericardial piece and narrow opening of internal tunnel were found by ultrasound after operation, and the opening of RSVC was found by ultrasound 3 months after operation.
The other 149 cases recovered smoothly in early postoperative period, with a mean mechanical ventilation time for 13.8 ± 11.7 h (2 ~ 63 h). Their mean postoperative hospital stay was 9.3±5.4 days (5~36 days). There was no arrhythmia after operations, and TTE examination before discharge showed no tunnel stenosis, marginal residual shunt and pulmonary venous obstruction except the case above.
Among the survivors, 143 cases were followed up for 2 months to 18 years. One case had postoperative residual ASD shunt, and 2 cases were newly diagnosed with discrete subaortic membranes 3 years after the operation, 1 of which underwent surgical treatment. All cases received intracardiac treatment with LSVC occurred no death and complications after operations.