Pacemaker with program acceptance verification by narrow extra pulse

Abstract From the Canadian patent

There is disclosed herein a programmable cardiac pacemaker pulse generator utilizing digital circuitry for controlling the provision of cardiac stimulating pulses. The pulse generator is capable of having the rate the pulse width, the pulse amplitude, the refractory period the sensitivity, and the mode of operation programmed. In addition the pulse generator can, have the output inhibited and can respond to programming signals causing a threshold margin test to be performed, effects of closure of the reed switch overridden, a hysteresis function added and a high rate exceeding the normal upper rate limit programmed. Many of the programmable functions of the pulse generator can either be …