Method and apparatus for detecting atrial filling pressure
First Claim
1. A system comprising:
- an implantable medical device, including;
a heart sound sensor, configured to sense a heart sound signal of a heart;
a heart sound detector, coupled to the heart sound sensor, the heart sound detector configured to detect at least one parameter using the heart sound signal, the at least one parameter including an amplitude and a duration of a heart sound; and
a processor, coupled to the heart sound detector, the processor configured to adjust the duration using the amplitude, and to provide the adjusted duration as a diagnostic indicator;
wherein the processor is configured to use the adjusted duration to distinguish between at least two atrial filling pressure magnitudes.
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Abstract
A cardiac rhythm management system provides for ambulatory monitoring of hemodynamic performance based on quantitative measurements of heart sound related parameters for diagnostic and therapeutic purposes. Monitoring of such heart sound related parameters allows the cardiac rhythm management system to determine a need for delivering a therapy and/or therapy parameter adjustments based on conditions of a heart. This monitoring also allows a physician to observe or assess the hemodynamic performance for diagnosing and making therapeutic decisions. Because the conditions of the heart may fluctuate and may deteriorate significantly between physician visits, the ambulatory monitoring, performed on a continuous or periodic basis, ensures a prompt response by the cardiac rhythm management system that may save a life, prevent hospitalization, or prevent further deterioration of the heart.
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Citations
20 Claims
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1. A system comprising:
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an implantable medical device, including; a heart sound sensor, configured to sense a heart sound signal of a heart; a heart sound detector, coupled to the heart sound sensor, the heart sound detector configured to detect at least one parameter using the heart sound signal, the at least one parameter including an amplitude and a duration of a heart sound; and a processor, coupled to the heart sound detector, the processor configured to adjust the duration using the amplitude, and to provide the adjusted duration as a diagnostic indicator; wherein the processor is configured to use the adjusted duration to distinguish between at least two atrial filling pressure magnitudes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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an implantable medical device, including; a heart sound sensor, configured to sense a heart sound signal of a heart; a heart sound detector, coupled to the heart sound sensor, the heart sound detector configured to detect at least one parameter using the heart sound signal, the at least one parameter including a frequency characteristic of a heart sound; and a processor, coupled to the heart sound detector, the processor configured to use the frequency characteristic as a diagnostic indicator. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system comprising:
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a heart sound sensor, configured to sense a heart sound signal of a heart; a heart sound detector, coupled to the heart sound sensor, the heart sound detector configured to detect at least one parameter using the heart sound signal, the at least one parameter including an amplitude and a duration of a heart sound; and a processor, coupled to the heart sound detector, the processor configured to adjust the duration using the amplitude, and to use the adjusted duration to distinguish between at least two atrial filling pressure magnitudes.
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Specification