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Pacemaker with vasovagal syncope detection

  • US 5,676,686 A
  • Filed: 04/25/1996
  • Issued: 10/14/1997
  • Est. Priority Date: 05/20/1994
  • Status: Expired due to Term
First Claim
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1. A cardiac pacer comprising:

  • means for detecting depolarizations of a heart;

    means for determining spontaneous heart depolarization rate;

    pulse generating means for delivering cardiac pacing pulses at a first pacing rate;

    drop detecting means for detecting a rapid drop in spontaneous heart depolarization rate, said drop detecting means comprising means for identifying a highest persistent heart rate over a limited time interval and means for determining whether said spontaneous heart depolarization rate has dropped more than a defined amount from said highest persistent heart rate; and

    means responsive to a said detected rapid drop in spontaneous heart depolarization rate for causing said pulse generator means to deliver pacing pulses at a second pacing rate higher than said first pacing rate.

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