SYSTEM FOR ESTIMATING CARDIAC PRESSURE USING PARAMETERS DERIVED FROM IMPEDANCE SIGNALS DETECTED BY AN IMPLANTABLE MEDICAL DEVICE
First Claim
1. A system for estimating cardiac pressure within a patient using an implantable medical device, the system comprising:
- an electrical field application system operative to apply an electrical field to tissues of the patient including cardiac tissues;
a measurement unit operative to measure a parameter influenced by the electrical field, the parameter being affected by cardiac pressure; and
a cardiac pressure estimation unit operative to estimate cardiac pressure within the patient by applying predetermined conversion factors to the measured parameter.
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Abstract
A method of monitoring pressure within a medical patient, includes measuring an actual pressure in a medical patient in a first time period; measuring an indicator of the actual pressure in the first time period, wherein the indicator is derived from an electrical signal of the patient'"'"'s heart; determining a correlative relationship between the actual pressure and the indicator, wherein both the actual pressure and the indicator are obtained in the first time period; measuring the indicator in a second time period; and determining the actual pressure in the second time period based on the correlative relationship obtained in the first time period and the indicator obtained in the second time period.
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Citations
6 Claims
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1. A system for estimating cardiac pressure within a patient using an implantable medical device, the system comprising:
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an electrical field application system operative to apply an electrical field to tissues of the patient including cardiac tissues;
a measurement unit operative to measure a parameter influenced by the electrical field, the parameter being affected by cardiac pressure; and
a cardiac pressure estimation unit operative to estimate cardiac pressure within the patient by applying predetermined conversion factors to the measured parameter. - View Dependent Claims (2, 3, 4, 5)
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6. A system for estimating cardiac pressure within a patient using an implantable medical device, the system comprising:
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means for applying an electrical field to tissues of the patient including cardiac tissues;
means for measuring a parameter influenced by the electrical field, the parameter being affected by cardiac pressure; and
means for estimating cardiac pressure within the patient by applying predetermined conversion factors to the measured parameter.
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Specification