ENDOCARDIAL LEAD SYSTEM

An endocardial lead (20) comprising an elongate body having a first defibrillation coil electrode (40), a second defibrillation coil electrode (44) and a first pacing/sensing electrode (42). The first defibrillation coil electrode has a first end at or near the distal end of the elongate body and a second end spaced longitudinally from the distal end. The first pacing/sensing electrode (42) is spaced longitudinally along the peripheral surface from the second end of the first defibrillation coil electrode and is disposed at a curved portion of the lead body. The second defibrillation coil electrode is spaced longitudinally along the peripheral surface from the first pacing/sensing electrode to afford positioning the first defibrillation coil longitudinally adjacent an apical location of the right ventricle (50) of a heart with the first pacing/sensing electrode within the right ventricle and the second defibrillation coil (44) within the right atrial chamber (52) or a major vein (54) leading to the right atrial chamber.