An implantable cardiac stimulation lead system for use with an implantable stimulation device includes an elongated lead with a conductor extending between distal and proximal ends. A tubular insulating sheath overlies the conductor and has an outer peripheral surface of revolution defined by a radius...http://www.google.de/patents/US20030233139?utm_source=gb-gplus-sharePatent US20030233139 - Technique for fixating a lead
