Figure legends
Fig 1 Treatment of type I UCSS by constructing internal tunnel: A. Preoperative TTE showed that LSVC drained into LA and CS was totally unroofed, associated with single atrium. B. Postoperative TEE showed drainage of LSVC to CS by establishing intracardiac tunnel. C. During the operation, a straight drainage tube was inserted into LSVC directly and the internal tunnel(arrow) was anastomosed along the tube.
Fig 2 Intracardiac treatment of LSVC drained into LA. A. Intracardiac baffle. B. Intracardiac tunnel.