Patent ID: 8055355
Filing Date: 2011-11-08
Classification: A61N

Abstract:
1. A lead comprising: a lead body extending from a proximal end to a distal end and having an intermediate portion therebetween; a first defibrillation hemispherical tip electrode disposed at the distal end of the lead body adapted to deliver defibrillation shocks at the distal end of the lead body; a second defibrillation electrode disposed at the intermediate portion of the lead body and adapted to deliver defibrillation shocks at the intermediate portion of the lead body; an electrical conductor having a first end and a second end and extending through the lead body from the intermediate portion at the first end to the distal end at the second end, the electrical conductor coupled to the second defibrillation electrode at the first end and the first defibrillation hemispherical tip electrode at the second end to electrically connect the second defibrillation electrode to the first defibrillation hemispherical tip electrode; a plurality of conductive tines disposed on the lead and located distally from the second defibrillation electrode and proximate the electrode tip at the distal end of the lead body such that when the tip electrode is positioned at an apex of a ventricle the plurality of conductive tines is also located at the apex of the ventricle; an electrical discharge element disposed on the lead body between the second defibrillation electrode and the plurality of conductive tines, the electrical discharge element including a plurality of electrical discharge surfaces for defibrillation shocks, each electrical discharge surface disposed between adjacent conductive tines; and an insulating portion that electrically insulates the plurality of conductive tines from the first defibrillation hemispherical tip electrode, the electrical discharge surface, and the second defibrillation electrode.