Patent ID: 7765015

Claim:
A medical electrical lead comprising: an elongate lead body having a proximal end, a distal end, an outer surface, and an inner surface, the body being made from an electrically insulative material and dimensioned such that the distal end can be implanted in a coronary sinus or coronary vein; an inflatable member disposed on the outer surface of the body between the proximal and distal ends, the inflatable member adapted to assume a deflated state and an inflated state in which the inflatable member is adapted to impart a radial force on and frictionally engage a surface of the coronary sinus or coronary vein for fixation of the distal end therein, the inflatable member including a resilient membrane attached to and extending partially circumferentially around a portion of the lead body; a conductive member extending from at least the proximal end toward the distal end of the body; an inner insulating layer disposed between the conductive member and the inner surface of the body and extending from the proximal end toward the distal end; an inflation lumen between the inner insulating layer and the inner surface of the body in fluid communication with the inflatable member; and an electrode on the body electrically coupled to the conductive member.