CRT lead placement. A standard CRT system consists of a right atrial lead, a right ventricular lead (in CRT pacemaker systems) or a right ventricular defibrillation lead (in CRT defibrillator systems), and a left ventricular lead. The left ventricular lead is placed in a tributary of the coronary sinus on the left lateral or posterolateral wall. Abbreviations: CRT, cardiac resynchronization therapy; LBBB, left bundle branch block. Reprinted from Lancet
378 (9792), Holzmeister, J. & Leclercq, C. Implantable cardioverter defibrillators and cardiac resynchronisation therapy, 722–730 © (2011), with permission from Elsevier.