Method and apparatus to optimize pacing based on intensity of acoustic signal
First Claim
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1. A method for adjusting a cardiac pacemaker by automatically responding to abnormal sounds caused by a suboptimal heart condition comprising;
- isolating a particular heart sound believed to be indicative of the suboptimal heart condition at least in part by relating it temporally to the time of first (S1 ) and second (S2) heart sounds from the signal produced by an acoustic sensor adaptively situated in association with the body of a patient to receive such sounds and from them for producing high signal levels of such sounds,determining a measure of at least one characteristic of the particular heart sound,adjusting the time period before the next delivered pacing pulse until the lowest desirable measure of said at least one characteristic of said particular heart sound is detected.
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Abstract
An acoustic sensor is located in association with a patient'"'"'s heart to detect abnormal heart sounds and a processor isolates abnormal heart sounds therefrom. The characteristics of these heart sounds are monitored while adjustments are made to the timing of pacing pulses to achieve a better heart function through pacing therapy. Particular adaption to cardiomyopathy is shown.
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17 Claims
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1. A method for adjusting a cardiac pacemaker by automatically responding to abnormal sounds caused by a suboptimal heart condition comprising;
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isolating a particular heart sound believed to be indicative of the suboptimal heart condition at least in part by relating it temporally to the time of first (S1 ) and second (S2) heart sounds from the signal produced by an acoustic sensor adaptively situated in association with the body of a patient to receive such sounds and from them for producing high signal levels of such sounds, determining a measure of at least one characteristic of the particular heart sound, adjusting the time period before the next delivered pacing pulse until the lowest desirable measure of said at least one characteristic of said particular heart sound is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for adjusting the timing of pacing pulses delivered by an implanted cardiac pacer based on acoustic intensity of a particular heart sound comprising:
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an acoustic sensor located in association with a patient'"'"'s body disposed so as to pick up heart sounds as said heart sounds occur in temporal relation to a first (S1) and a second (S2) heart sound in each cardiac cycle and for providing as output an intensity signal related to sensed volume of all sensed said heart sounds, a circuit for determining the intensity of one particular heart sound from the output of said acoustic sensor, a processor for adjusting the delay period between delivered pacing pulses delivered by said cardiac pacemaker adapted to make said adjustments based on the intensity of said one particular heart sound said one particular heart sound is known as Mitral Regurgitation which occurs between said first and second heart sounds. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification