Patent ID: 7657326
Filing Date: 2010-02-02
Classification: A61N

Abstract:
1. A cardiac rhythm management system comprising: a pulse generator adapted to deliver a therapy to a patient's heart; an electrical lead comprising a lead body having a proximal portion and a distal portion, the proximal portion operatively coupled to the pulse generator and the distal portion adapted to be placed in a chamber of the heart, the distal portion comprising an outer surface including a recessed groove formed therein such that the groove extends at least partially through the outer surface of the distal portion of the lead body and wherein the groove includes a first stop region and a second stop region; at least one conductor extending within the lead body; at least one electrode located at a distal end of the electrical lead body and operatively coupled to the at least one conductor; and a fixation helix disposed over the distal portion of the lead body including the electrode, the fixation helix adapted to extend from a retracted position disposed over the distal portion of the lead body to an extended position located distally to the distal end of the electrical lead body, the fixation helix comprising a pin slideably engaged in the groove formed in the outer surface distal portion of the lead body, wherein the pin and the groove are adapted to control the advancement of the fixation helix.