METHOD AND APPARATUS FOR MONITORING OF DIASTOLIC HEMODYNAMICS
First Claim
1. A system adapted to be coupled to a patient, the system comprising:
- an acoustic sensor including an accelerometer adapted to sense an acoustic energy and produce an acoustic sensor signal indicative of heart sounds of the patient;
a cardiac sensing circuit adapted to sense a cardiac signal indicative of cardiac electrical events;
a heart sound detector coupled to the acoustic sensor and the cardiac sensing circuit, the heart sound detector adapted to detect selected heart sounds indicative of ventricular diastolic hemodynamic performance using the acoustic sensor signal and the cardiac signal;
a parameter generator coupled to the heart sound detector, the parameter generator adapted to generate values of at least one predetermined parameter related to the selected heart sounds; and
a processor coupled to the parameter generator, the processor adapted to perform a statistical process analyzing the values of the at least one predetermined parameter generated for a predetermined duration and produce at least one trend quantitatively presenting one or more ventricular diastolic filling pattern changes during the predetermined duration using an outcome of the statistical process.
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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
23 Claims
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1. A system adapted to be coupled to a patient, the system comprising:
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an acoustic sensor including an accelerometer adapted to sense an acoustic energy and produce an acoustic sensor signal indicative of heart sounds of the patient; a cardiac sensing circuit adapted to sense a cardiac signal indicative of cardiac electrical events; a heart sound detector coupled to the acoustic sensor and the cardiac sensing circuit, the heart sound detector adapted to detect selected heart sounds indicative of ventricular diastolic hemodynamic performance using the acoustic sensor signal and the cardiac signal; a parameter generator coupled to the heart sound detector, the parameter generator adapted to generate values of at least one predetermined parameter related to the selected heart sounds; and a processor coupled to the parameter generator, the processor adapted to perform a statistical process analyzing the values of the at least one predetermined parameter generated for a predetermined duration and produce at least one trend quantitatively presenting one or more ventricular diastolic filling pattern changes during the predetermined duration using an outcome of the statistical process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method, comprising:
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sensing an acoustic energy to produce an acoustic sensor signal using an accelerometer, the acoustic signal indicative heart sounds of a patient; sensing at least one cardiac signal indicative of cardiac electrical events; detecting selected heart sounds indicative of ventricular diastolic hemodynamic performance using the acoustic sensor signal and the cardiac signal; generating values of at least one predetermined parameter related to the selected heart sounds using the acoustic sensor signal and the cardiac signal; performing a statistical process analyzing selected values of the at least one predetermined parameter, the selected values associated with the selected heart sounds detected during a first predetermined period of time; and producing at least one trend quantitatively presenting one or more ventricular diastolic filling pattern changes during the predetermined period of time using an outcome of the statistical process. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification