Transvenous implantation of dual chamber pacemaker in a patient with single persistent left superior vena cava

A transvenous dual chamber pacemaker implantation was successfully achieved via right subclavian vein in a patient with a persistent left superior vena cava (PLSVC) and absent right superior vena cava (SVC). An active fixation atrial lead was placed in the coronary sinus (CS) with satisfactory long-term pacemaker function.