Method and apparatus to deliver mechanically fused pacing therapy
First Claim
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1. A method of providing mechanically fused left ventricular cardiac stimulation comprising:
- delivering a left ventricular cardiac stimulation pulse to a patient at an AV interval;
monitoring a left ventricular acceleration signal;
detecting a time of an aortic valve opening following the delivered left ventricular cardiac stimulation pulse using the left ventricular acceleration signal;
measuring a mechanical response interval between the delivered left ventricular cardiac stimulation pulse and the detected time of the aortic valve opening;
comparing the measured mechanical response interval to a desired mechanical response interval; and
adjusting subsequent AV intervals until subsequent measured mechanical response intervals generally equal the desired mechanical response interval.
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Abstract
A medical device system and method for delivering mechanically fused left ventricular cardiac stimulation. A sensor monitors left ventricular acceleration while left ventricular cardiac stimulation is provided at an AV interval. The left ventricular acceleration is used to calculate a mechanical response interval and the mechanical response interval is compared to a desired mechanical response interval. The AV interval is adjusted until the mechanical response interval is equal to the desired mechanical response interval.
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11 Claims
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1. A method of providing mechanically fused left ventricular cardiac stimulation comprising:
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delivering a left ventricular cardiac stimulation pulse to a patient at an AV interval; monitoring a left ventricular acceleration signal; detecting a time of an aortic valve opening following the delivered left ventricular cardiac stimulation pulse using the left ventricular acceleration signal; measuring a mechanical response interval between the delivered left ventricular cardiac stimulation pulse and the detected time of the aortic valve opening; comparing the measured mechanical response interval to a desired mechanical response interval; and adjusting subsequent AV intervals until subsequent measured mechanical response intervals generally equal the desired mechanical response interval. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of providing mechanically fused left ventricular cardiac stimulation comprising:
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delivering a left ventricular cardiac stimulation pulse to a patient at an AV interval; monitoring a left ventricular acceleration signal; detecting a an aortic valve opening following the delivered left ventricular cardiac stimulation pulse using the left ventricular acceleration signal; measuring an interval between the delivered left ventricular cardiac stimulation pulse and the detected time of the aortic valve opening; comparing the measured interval to a desired pre-ejection interval; and adjusting subsequent AV intervals until subsequent measured intervals generally equal the desired pre-ejection interval. - View Dependent Claims (8, 9, 10, 11)
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Specification