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Pressure regulated atrio-ventricular delay for multi-site pacing

  • US 20040215266A1
  • Filed: 04/24/2003
  • Published: 10/28/2004
  • Est. Priority Date: 04/24/2003
  • Status: Active Grant
First Claim
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1. A cardiac pacemaker for pressure regulated atrio-ventricular delay for multi-site pacing, comprising:

  • a housing having a power supply carried in the housing and a feedthrough;

    a controller carried in the housing coupled to the power supply;

    memory coupled to the controller;

    pacing electronics coupled to the controller and the feedthrough;

    sensing electronics coupled to the controller and the feedthrough;

    a first electrical lead coupled to the feedthrough and configured for positioning in an atrium;

    a second electrical lead coupled to the feedthrough and configured for positioning in a ventricle a pressure sensor carried on the second electrical lead;

    a second electrical lead coupled to the feedthrough and configured for positioning in the left ventricle; and

    , software stored in memory containing instructions including, a first sequence of instructions when executed by the controller, causes the controller to record atrial activation and ventricle activation, a second sequence of instructions when executed by the controller, causes the controller to identify a maximum diastolic pressure, a third sequence of instructions when executed by the controller, causes the controller to identify a declination pressure occurring at an isovolumetric contraction beginning, a forth sequence of instructions when executed by the controller, causes the controller to calculate the percent decrease between the maximum diastolic pressure and the declination pressure, and, a fifth sequence of instructions when executed by the controller, causes the controller to adjust atrio-ventricular delay according to the percent decrease between the maximum diastolic pressure and the declination pressure.

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