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Method and apparatus for assessing left ventricular function and optimizing cardiac pacing intervals based on left ventricular wall motion

  • US 7,610,088 B2
  • Filed: 02/28/2003
  • Issued: 10/27/2009
  • Est. Priority Date: 02/28/2003
  • Status: Expired due to Fees
First Claim
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1. A method for monitoring left ventricular function during delivery of a cardiac resynchronization therapy (CRT), comprising:

  • deploying a motion sensor to a fixed location on a portion of a left ventricular lateral wall wherein the motion sensor generates a motion signal proportional to motion of the portion of the left ventricular lateral wall;

    opening a data collection window during a portion of a selected cardiac cycle phase;

    storing the motion signal throughout at least a part of the portion of the data collection window for a predetermined time interval or for more than one cardiac cycle;

    verifying a heart rate stability characteristic during the predetermined time interval or for more than one cardiac cycleaveraging the stored motion signal;

    determining a signal characteristic from the averaged stored signal that is representative of left ventricular function; and

    delivering a cardiac resynchronization therapy (CRT) based at least in part upon the signal characteristic;

    wherein the motion sensor consists of one from the group;

    a piezoelectric sensor, an optical sensor, a Hall-effect type sensor, a capacitive sensor, a resistive sensor, an inductive sensor.

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