Figure 4. Components of implantable cardioverter-defibrillator systems. Left upper panel: schematic diagram summarizes major components and interfaces of ICD pulse generator. Lower panel: schematic diagram shows typical tripolar transvenous defibrillation lead.
A-distal steroid-eluting pace/sense electrode (cathode); B-proximal pace/sense spring electrode (anode) and distal defibrillating spring electrode; C-proximal defibrillating spring electrode;
D-anchoring sleeves; E-yoke; F-distal defibrillating electrode terminal (cathode); G-proximal and distal pace/sense electrode terminal; H-proximal defibrillating electrode terminal (anode). Upper right panel: schematic diagram depicts typical position of pace/sense/defibrillation lead in right side of heart.