Patent ID: 7628801

Claim:
A lead assembly for coupling to an implantable pulse generator, the lead assembly comprising: a lead body adapted to carry signals, the lead body having a proximal end and a distal end, and an intermediate portion therebetween; a connector located at the proximal end of the lead body for coupling the lead assembly to the implantable pulse generator; at least one conductor disposed within the lead body; the lead body having at least one preformed biased portion at an intermediate portion of the lead body, the biased portion constructed and arranged to fixate against an interior wall of a coronary vessel upon implantation; a first unbiased portion disposed adjacent a proximal end of the biased portion; a second unbiased portion disposed adjacent a distal end of the biased portion, the second unbiased portion including a flexible tapered portion substantially more flexible than the biased portion and adapted to be implanted within a passage, the flexible tapered portion terminating at a distal tip of the lead body; an open lumen extending longitudinally through the distal tip of the lead body such that the lead can be threaded over a guidewire during implantation of the lead; and at least a first and a second electrode coupled with the at least one conductor and disposed on the biased portion.