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Ventricular conduction delay trending system and method

  • US 6,763,267 B2
  • Filed: 01/22/2002
  • Issued: 07/13/2004
  • Est. Priority Date: 07/13/2000
  • Status: Expired due to Term
First Claim
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1. A cardiac pacemaker, comprising;

  • an atrial sensing channel for sensing electrical events occurring in an atrium;

    first and second ventricular sensing channels for sensing electrical events occurring at first and second ventricular locations;

    a ventricular pacing channel and a controller for pacing a ventricle in response to sensed events and lapsed time intervals in a mode such that the ventricle is paced at a programmed AV interval after an atrial sense or pace;

    circuitry for detecting R waves in the ventricular sensing channels following detection of a P wave due to a detected atrial depolarization;

    circuitry for measuring first and second PR intervals associated with the first and second ventricular sensing channels, and calculating a conduction delay value as the difference between the first and second PR intervals; and

    , wherein the controller is programmed to decrease or increase the programmed AV interval in accordance with an increase or decrease, respectively, of an average of conduction delays measured over a period of time.

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