Patent ID: 7542808

Claim:
A pacing lead and catheter assembly for accessing lateral branch veins of the coronary sinus, the pacing lead and catheter assembly comprising: a guide catheter having an open lumen extending therethrough, a proximal end and a distal end, said distal end pre-formed with a guide curve; and a chronic pacing lead having an elongated lead body, an electrode coupled to the lead body and in communication with a conductor, and a fixation mechanism coupled to the lead body, wherein the pacing lead is slidably receivable within the guide catheter lumen, and has a proximal end and a distal end pre-formed with a first curve and a second curve extending proximally from the first curve, said second curve adapted to mate with the guide curve to direct the first curve into a selected branch vein of the coronary sinus; wherein the lead body is non-torquable such that, during implantation, rotation of the proximal end is not transferred to the guide curve.