Patent ID: 8670824

Claim:
A method comprising: introducing into a coronary sinus of a heart a distal portion of a lead body component that comprises a proximal end and a distal end, wherein a first electrode, a second electrode, a third electrode and a fourth electrode are coupled to the lead body component, wherein the first through fourth electrodes are located on the lead body component from most distal to most proximal, wherein introducing the distal portion of the lead body component into the coronary sinus comprises positioning the first electrode in a tributary vein of a great cardiac vein of the heart, the fourth electrode within a right atrium of the heart, and the second or third electrode proximate an ostium of the coronary sinus; and attaching the lead body component to a wall of the coronary sinus, proximate the ostium of the coronary sinus, using a fixation member, the fixation member attached to the lead body component proximate to at least one of the second electrode or the third electrode; wherein the fixation member is configured to penetrate myocardial tissue.