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