System and method for pacing parameter optimization using heart sounds
First Claim
1. A method comprisingdelivering, by a medical device system, pacing pulses at varying pacing settings;
- obtaining, by the medical device system, heart sound signals from an acoustical sensor;
determining, by the medical device system and based on the heart sound signals, a plurality of heart sound signal parameters;
determining, by the medical device system and based on the heart sound signal parameters, a relative change of a V-S2 interval, wherein the V-S2 interval is a time interval between a ventricular electrical event and an S2 heart sound, and wherein the relative change of the V-S2 interval is responsive to the varying pacing settings;
identifying, by the medical device system and based on the relative change of the V-S2 interval, a target pacing parameter; and
delivering, by the medical device system, pacing pulses according to the target pacing parameter.
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Abstract
A medical device system and associated method predict a patient response to a cardiac therapy. The system includes for delivering cardiac pacing pulses to a patient'"'"'s heart coupled to a cardiac sensing module and a cardiac pacing module for generating cardiac pacing pulses and controlling delivery of the pacing pulses at multiple pace parameter settings. An acoustical sensor obtains heart sound signals. A processor is enabled to receive the heart sound signals, derive a plurality of heart sound signal parameters from the heart sound signals, and determine a trend of each of the plurality of heart sound signal parameters with respect to the plurality of pace parameter settings. An external display is configured to present the trend of at least one heart sound parameter with respect to the plurality of pace parameter settings.
33 Citations
21 Claims
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1. A method comprising
delivering, by a medical device system, pacing pulses at varying pacing settings; -
obtaining, by the medical device system, heart sound signals from an acoustical sensor; determining, by the medical device system and based on the heart sound signals, a plurality of heart sound signal parameters; determining, by the medical device system and based on the heart sound signal parameters, a relative change of a V-S2 interval, wherein the V-S2 interval is a time interval between a ventricular electrical event and an S2 heart sound, and wherein the relative change of the V-S2 interval is responsive to the varying pacing settings; identifying, by the medical device system and based on the relative change of the V-S2 interval, a target pacing parameter; and delivering, by the medical device system, pacing pulses according to the target pacing parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device system comprising:
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therapy delivery circuitry; an acoustical sensor; and processing circuitry configured to; control delivery of pacing pulses by the therapy delivery circuitry at varying pacing settings, obtain heart sound signals from the acoustical sensor, determine, based on the heart sound signals, a plurality of heart sound signal parameters, determine, based on the heart sound signal parameters, a relative change of a V-S2 interval, wherein the V-S2 interval is a time interval between a ventricular electrical event and an S2 heart sound, and wherein the relative change of the V-S2 interval is responsive to the varying pacing settings, identify, based on the relative change of the V-S2 interval, a target pacing parameter, and control delivery of pacing pulses at the target pacing parameter. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable storage medium comprising instructions that, when executed, configure processing circuitry of a medical device system to:
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control delivery of pacing pulses at varying pacing settings; obtain heart sound signals from an acoustical sensor; determine, based on the heart sound signals, a plurality of heart sound signal parameters; determine, based on the heart sound signal parameters, a relative change of a V-S2 interval, wherein the V-S2 interval is a time interval between a ventricular electrical event and an S2 heart sound, and wherein the relative change of the V-S2 interval is responsive to the varying pacing settings; identify, based on the relative change of the V-S2 interval, a target pacing parameter; and deliver pacing pulses according to the target pacing parameter. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification