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Cardiac pacing using adjustable atrio-ventricular delays

  • US 6,144,880 A
  • Filed: 05/08/1998
  • Issued: 11/07/2000
  • Est. Priority Date: 05/08/1998
  • Status: Expired due to Term
First Claim
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1. A method, comprising:

  • measuring an interval during a nonpaced systolic cycle between a first event and a second event, the first event related to an atrial contraction which is in a first predictable time-dependent relationship and the second event which is in a second predictable time-dependent relationship to a ventricular pacing signal optimally timed for maximum peak positive LV pressure change during systole, (LV+dp/dt);

    generating an atrio-ventricular delay (AVDc) calculated from a predetermined mapping of a relationship of the interval to an optimal atrio-ventricular delay for maximum peak positive LV pressure change during systole, (LV+dp/dt); and

    delivering a pacing pulse to a ventricle with the generated atrio-ventricular delay (AVDc);

    wherein AVDc provides an approximation of the optimal atrio-ventricular delay for pacing the ventricle to provide maximum peak positive LV pressure change during systole, (LVA+dp/dt).

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