Patent ID: 8634933

Claim:
An implantable lead comprising: an elongate body extending between a proximal region and a distal region, the elongate body including: an outer sheath; and an inner member disposed within the outer sheath, the inner member including a coil lumen, a conductor lumen and one or more longitudinally extending crumple zones arranged in an outer surface of the inner member; a connector assembly secured to the proximal region for coupling the lead to an implantable medical device, the connector assembly including a terminal pin rotatable relative to the body; a conductor coil disposed longitudinally within the coil lumen and coupled to the terminal pin, the conductor coil rotatable relative to the body; a conductor cable disposed longitudinally within the cable lumen; a coupler rotatably disposed within the distal region of the elongate body and connected to the conductor coil; a fixation helix secured to the coupler; and an electrode disposed about the distal region of the elongate body, the electrode electrically connected to the conductor cable; wherein the terminal pin is rotatably engaged with the coupler via the conductor coil such that rotation of the terminal pin causes the coupler and the fixation helix to rotate and therefore translate relative to the elongate body.