A pacemaker of the inhibited demand type which is equipped with a battery and pacemaker efficiency evaluator. A magnetically initialized test circuit synchronizes the timing of test stimulating pulses with the natural R-wave or, the end of a basic pacemaker escape interval, thereby to enhance patient...http://www.google.es/patents/US4445512?utm_source=gb-gplus-sharePatente US4445512 - Method and apparatus for evaluating pacer battery status and stimulation effectiveness
Method and apparatus for evaluating pacer battery status and stimulation ...