Patent ID: 7747333

Claim:
An apparatus comprising: an elongate body extending from a proximal end to a distal end; a conductor disposed within the elongate body; an electrode coupled to the elongate body, wherein the electrode is in electrical communication with the conductor; a push tube extending along at least a portion of the elongate body; and an active fixation device slidably coupled with at least a portion of an outer perimeter of the elongate body, the active fixation device is detachably coupled with the push tube, and the active fixation device includes: an arched lumen, and the elongate body is received within the arched lumen, an arched inner surface extending along the arched lumen, the arched inner surface is engaged against a portion of the elongate body between the proximal end and the distal end, and the arched inner surface biases the portion of the elongate body into a corresponding arched configuration relative to the remainder of the elongate body, and an electrode opening extending from an active fixation device outer surface to the arched inner surface, and the biased portion of the elongate body in the arched configuration extends through the electrode opening beyond the active fixation device outer surface.