Patent ID: 8332050

Claim:
A medical device lead comprising: at least one electrode; a helically coiled conductor electrically coupled to the at least one electrode, the helically coiled conductor including a plurality of turns helically wound around a longitudinal axis of the conductor the helically coiled conductor having a coil pitch and an outer diameter, the helically coiled conductor consisting of one filar having a filar diameter, wherein the coil pitch is one to about two times the filar diameter and the outer diameter is at least 4.5 times the coil pitch to minimize heating of the helically coiled conductor in the presence of an MRI field; and a polymer sheath formed over the helically coiled conductor such that the coil pitch of the unifilar helically coiled conductor is maintained, wherein the polymer sheath is configured to increase a torque transmitting capacity of the helically coiled conductor.