Patent ID: 8543223

Claim:
A therapy delivery element adapted to be implanted into a living body, the therapy delivery element comprising: an electrode portion including a plurality of electrodes; at least one elongated lead body attached to the electrode portion, the elongated lead body including: a stylet coil having a stylet coil lumen, the stylet coil extending within the elongated lead body and along at least a portion of the electrode portion; a conductor assembly including a plurality of insulated electrical conductors braided in a tubular braided configuration around the stylet coil and electrically coupled to one or more of the electrodes, the tubular braided configuration including the plurality of insulated electrical conductors braided with one another, the conductor assembly including an inner lumen with a diameter greater than an outside diameter of the stylet coil, wherein the inner lumen of the conductor assembly is separated from the stylet coil by a gap with the elongated lead body in a relaxed condition, wherein axial elongation of the elongated lead body reduces an inner diameter of the conductor assembly to close the gap and cause the conductor assembly to constrict around the stylet coil; and a low durometer insulator extending around the conductor assembly; and a stylet sized to slide freely within the stylet coil lumen during implantation of the therapy delivery element into the living body.