A pair of defibrillation patch electrodes is adapted for close fitting placement over the ventricles of the heart, either epicardially or pericardially. One of the patches is contoured to fit over the right ventricle, and the other is contoured to fit over the left ventricle in spaced relationship to...http://www.google.co.uk/patents/US4827932?utm_source=gb-gplus-sharePatent US4827932 - Implantable defibrillation electrodes
