Patent ID: 6909920

Claim:
An implantable medical device (IMD) adapted for implantation within a body, comprising: an elongated body having a proximal end and a distal end, the distal end including an inner lumen; a helix residing within the inner lumen and adapted to be extended beyond the distal end of the elongated body, at least a portion of the helix having a diameter that is larger than the diameter of the elongated body when the helix is extended to aid in affixing the helix in an implantation; and a fixation assembly coupled to a proximal end of the helix and including a coupling member having a stylet interface slot wherein selective engagement with and rotation of the coupling member via the stylet interface slot, in a respective predetermined direction causes the helix to be extended and retracted, the fixation assembly being adapted to allow for retraction of the helix such that the helix re-assumes a compressed configuration within the inner lumen.