Method and apparatus for delivering defibrillation therapy through a sensing electrode

摘要: A pulse generator circuit and method for using a defibrillation lead positioned close to the right ventricular apex optimize energy delivery sensing. This includes operating defibrillator-pacemaker system in true bipolar sensing mode as long high voltage therapy is not required. When required, delivers first via an RV electrode, and, sensing, determines whether was successful. If deemed be successful, then resumed. Otherwise, causes ring electrode electrically connected second therapy, integrated In this way, because no new elements are added within lead, size complexity increased.