Patent ID: 7662132

Claim:
A cardiac lead comprising: a lead body having an outer surface and including a proximal end adapted to be connected to a pulse generator, a distal end, and a lumen adapted to receive a guiding member extending between the proximal end and the distal end; at least one conductor extending within the lead body from the proximal end to the distal end; at least one electrode located on the lead body operatively coupled to the at least one conductor; a preformed, self-expanding helical fixation member positioned externally over a distal portion of the lead body adjacent to the at least one electrode, the fixation member including a distal end fixed to the outer surface of the lead body and an unattached, free proximal end slideably adjacent to the outer surface lead body such that the unattached free proximal end is adapted to slide along the outer surface of the lead body when the fixation member is transitioned from a collapsed configuration to an expanded configuration, wherein the fixation member is preformed such that in the expanded configuration the fixation member is biased to a side of the lead body.