Patent ID: 8103360

Claim:
A medical electrical lead, comprising: an insulated lead body including at least one electrode; a plurality of conductor coils extending helically along a length of the lead body, each conductor coil including: at least one helically coiled conductor electrically coupled to the at least one electrode, the at least one conductor including a plurality of turns disposed about a longitudinal axis of the lead body; at least one helically coiled spacer element electrically isolated from the at least one electrode, the at least one spacer element including a plurality of turns disposed about the longitudinal axis, wherein one or more turns of the spacer element are interstitially disposed between at least one adjacent turn of the conductor; wherein the at least one helically coiled spacer element comprises a non-symmetric extrusion disposed over the at least one helically coiled conductor; and wherein the at least one helically coiled conductor and the at least one helically coiled spacer element form a close-wound coil assembly extending along a length of the lead body.