An implantable programmable pacemaker includes a sensor for measuring SO.sub.2 levels in blood on a periodic basis, e.g., every 15 seconds, while the pacemaker is operating in its programmed mode of operation. The energy of stimulation pulses generated by the pacemaker is automatically adjusted, as required,...http://www.google.fr/patents/US5176138?utm_source=gb-gplus-shareBrevet US5176138 - Implantable pacemaker having means for automatically adjusting stimulation energy as a function of sensed SO.sub.2
Implantable pacemaker having means for automatically adjusting stimulation ...