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Method and system for delivering cardiac resynchronization therapy with variable atrio-ventricular delay

  • US 8,121,685 B2
  • Filed: 11/20/2009
  • Issued: 02/21/2012
  • Est. Priority Date: 12/22/2003
  • Status: Active Grant
First Claim
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1. A cardiac rhythm management system, comprising:

  • a plurality of sense amplifiers configured to sense cardiac electrical activity;

    a plurality of pulse generators configured to deliver pacing pulses; and

    a controller for controlling delivery of the pacing pulses, the controller programmed to;

    control delivery of ventricular pacing using a programmable atrio-ventricular delay (AVD) interval in accordance with an atrial tracking or AV sequential pacing mode;

    determine a present atrial rate;

    vary the AVD interval by setting the AVD interval to an optimum value stored in a table, the optimal value associated with the present atrial rate;

    measure an intrinsic conduction parameter;

    compute an optimal value for the AVD interval as a linear function of the measured intrinsic conduction parameter; and

    initialize or update the table by storing the computed optimal value and an associated atrial rate in the table, the associated atrial rate corresponding to the present atrial rate.

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