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Bi-ventricular pacing method

  • US 6,223,079 B1
  • Filed: 01/28/2000
  • Issued: 04/24/2001
  • Est. Priority Date: 12/15/1997
  • Status: Expired due to Fees
First Claim
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1. A method of cardiac pacing, comprising:

  • cyclically determining, employing impedance signal measurement and processing means, mechanical events indicative of left ventricular contraction and right ventricular contraction;

    cyclically determining cardiac output from the patients left ventricle;

    pacing said patient'"'"'s left ventricle with varying timing relative to said right ventricular contractions and determining the relative mechanical synchronization of left ventricular and right ventricular contractions which results in maximum cardiac output;

    maintaining said relative mechanical synchronization, comprising;

    determining atrial excitations of the patient;

    controlling delivery of each left ventricular pace pulse at an LAVD delay following each said atrial excitation; and

    adjusting said LAVD delay to obtain said relative mechanical synchronization for optimum cardiac output pacing the patient'"'"'s right ventricle at an RAVO delay following said atrial excitation, and controlling said RAVD and LAVD delays to maintain said relative mechanical synchronization.

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