Patent ID: 8224457

Claim:
A medical implantable lead comprising: a flexible, flat elongate body having a longitudinal axis, a proximal end configured for connection to an implantable medical device, a distal end configured for interaction with tissue in vivo, a longitudinal length between said proximal end and said distal end, and a cavity therein extending along the longitudinal length, the cavity adapted to receive a stylet; a layer of flat strip conductors extending along said longitudinal length of said flat elongate body; a top insulating layer composed of insulating material; a bottom insulating layer composed of insulating material; said layer of flat strip conductors being sealingly enclosed between said top insulating layer and said bottom insulating layer with insulating material between said flat strip conductors that separates said flat strip conductors in said layer of flat strip conductors from each other in a direction perpendicular to said longitudinal length; and at least a substantial portion of said flat elongate body, containing at least a portion of said layer of flat strip conductors, being twisted about said longitudinal axis to form an elongate helical portion.