Disclosed is an implantable catheter-type cardioverting electrode whose conductive discharge surface is comprised of coils of wound spring wire. An electrically conductive lead extends through the wound wire section of the electrode and has its distal end connected to the discharge coil at two locations....http://www.google.com.au/patents/US4161952?utm_source=gb-gplus-sharePatent US4161952 - Wound wire catheter cardioverting electrode
