A system includes a housing with energy delivery circuitry and detection circuitry. One or more electrodes are coupled to the circuitry and used to sense cardiac and muscle activity. A processor is coupled to the energy delivery and detection circuitry. The processor may detect a ventricular arrhythmia...http://www.google.com.hk/patents/US7117035?utm_source=gb-gplus-share專利 US7117035 - Subcutaneous cardiac stimulation system with patient activity sensing
