In this case, an isolated persistent left superior vena cava (PLSVC) was present. A PLSVC is a remnant of the left cardinal vein which is normally obliterated during early embryological development, leaving the ligament of Marshall [ ]. Failure of this regression will leave a PLSVC. In about 90% of cases, a PLSVC drains into the coronary sinus [ ].
展开▼
