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Adaptive search AV and auto PVARP adaptation to same with additional benefit

  • US 5,861,007 A
  • Filed: 02/26/1997
  • Issued: 01/19/1999
  • Est. Priority Date: 09/29/1995
  • Status: Expired due to Term
First Claim
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1. A method to determine if AV conduction is occurring so as to eliminate a substantial number of unnecessary ventricular paces wherein a pacemaker for performing such method has a stored and updatable value for an AV interval upon which it makes a determination of when to deliver a next ventricular pacing pulse, said method comprising the steps:

  • storing a predetermined number of AV event cycles'"'"' timing values,providing a first testing step in one heart beat cycle in a set of successive heart beat cycles to determine whether a Ventricular Sense (VS) event would occur after a scheduled Ventricular Pace(VP) by extending the AV interval in a successive heart beat cycle so as to allow said VS to occur in a first lengthened AV interval,then determining if said VS occurred after applying the first lengthened AV interval, and then,lengthening the first lengthened AV interval used to determine the time to generate a VP if said VS did occur within said first lengthened AV interval.

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