永存左上腔静脉(Persistent Left Superior Vena cava,PLSVC)又称左上腔静脉残留或双侧上腔静脉,系腔静脉畸形最具临床意义的一种。多数情况下,由于PLSVC血流汇入心房,与正常血液循环途径相似,故无临床表现,此种类型占左上腔静脉残留的90%,常给心血管疾病的诊断和治疗带来某 Permanent left superior vena cava (PLSVC), also known as left superior vena cava or bilateral superior vena cava, the most clinically significant one. In most cases, PLSVC flow into the atrium, and the normal blood circulation is similar, so no clinical manifestations, this type of left ventricular residual veins accounted for 90%, often to the diagnosis and treatment of cardiovascular disease brought a