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System and method for preventing false pacemaker PVC response

  • US 5,097,832 A
  • Filed: 03/09/1990
  • Issued: 03/24/1992
  • Est. Priority Date: 03/09/1990
  • Status: Expired due to Term
First Claim
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1. In an implantable pacemaker having means for sensing atrial and ventricular events, means for generating an atrial stimulation pulse, means for generating an atrial refractory time interval having a relative refractory portion wherein sensed atrial activity is considered as atrial noise and not as a valid atrial event, and means for detecting apremature ventricular contraction (PVC) and responding thereto in a prescribed manner, electornic circuit means for preventing said PVC detecting means from responding to a false PVC comprising:

  • means for generating a latched signal in the event atrial noise is sensed during said relative refractory portion of said atrial refractory time interval;

    means responsive to said latched signal for causing said PVC detecting means to assume a disabled state, said disabled state continuing until the first occurrence thereafter of a prescribed re-enabling event; and

    means responsive to said prescribed re-enabling event for enabling said PVC detecting means;

    a PVC thereby not being detectable by said PVC detecting means subsequent to the occurrence of atrial noise until said re-enabling event occurs.

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