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Atrial refractory control for R-wave rejection in pacemakers

  • US 4,343,311 A
  • Filed: 04/30/1980
  • Issued: 08/10/1982
  • Est. Priority Date: 04/30/1980
  • Status: Expired due to Term
First Claim
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1. A pacemaker for selectively delivering stimulating pulses to the heart in an atrial synchronous mode of operation, comprising:

  • ventricular terminal means for connection to a patient'"'"'s heart for delivering ventricular stimulation pulses thereto;

    generating means for selectively delivering ventricular electrical stimulation pulses to said ventricular terminal means;

    ventricular sense amplifier means connected to said ventricular terminal means for sensing ventricular beats of the heart, said ventricular sense amplifier means having a refractory period following the sensing of a ventricular heartbeat or stimulation pulse;

    atrial terminal means for connection to a patient'"'"'s heart for sensing atrial beats;

    atrial sense amplifier means connected to said atrial terminal means for sensing atrial contractions of the heart;

    delay means operatively connected to said atrial sense amplifier means and said generating means for causing generation of a ventricular electrical stimulating pulse after a predetermined time interval following a sensed atrial contraction; and

    control means operatively connected to render said atrial sense amplifier means inoperative during the refractory period of said ventricular sensing amplifier.

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