An implantable system for the defibrillation or cardioversion of the heart of a patient in need of such treatment comprises a plurality of primary electrodes, a power supply, and a control circuit. Preferably, at least one auxiliary electrode is also included. The plurality of primary electrodes are...http://www.google.com.au/patents/US5978705?utm_source=gb-gplus-sharePatent US5978705 - Method and apparatus for treating cardiac arrhythmia using auxiliary pulse
