The main symptoms and physical signs disappeared in 3 patients,partially alleviated in one because of concomitant hepatic vein obstruction,In one case,the spiral Z stent migrated from superior vena cana into the pulmonary trunk.

• 3例于术后症状、体征消失，1例由于存在肝静脉阻塞，其症状仅部分缓解； 1例支架由上腔静脉脱落并移位至肺动脉主干内及左肺动脉。