Implantable medical device for assessing heart failure state from Mechanical Pulsus Alternans
First Claim
1. A method of operation of an implantable heart monitor implanted in a patient'"'"'s body having electrogram (EGM) sense electrodes coupled with EGM sense circuitry to generate sense events upon detection of cardiac depolarizations and a blood pressure measurement transducer disposed in a heart chamber and coupled with blood pressure measurement circuitry to assess heart failure state as a function of mechanical pulsus alternans (MPA) comprising:
- operating the blood pressure measurement transducer to make blood pressure measurements;
detecting the onset of an MPA episode of the patient'"'"'s heart from the blood pressure measurements;
determining at least one MPA characteristic of the MPA episode; and
assessing heart failure state from the MPA characteristic.
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Accused Products
Abstract
An implantable heart monitor (IHM) implanted in a patient'"'"'s body having electrogram (EGM) sense electrodes coupled with EGM sense circuitry to generate sense events upon detection of cardiac depolarizations and a blood pressure measurement transducer disposed in a heart chamber and coupled with blood pressure measurement circuitry operates to assess heart failure state as a function of mechanical pulsus alternans (MPA). MPA episodes are detected, and MPA characteristics of the MPA episode are used alone or as a group as a diagnostic marker of HF state. The MPA episode data set can be stored in memory associated with a time and date stamp. The MPA characteristics of each MPA data set in a series of MPA data sets collected over time can be compared or plotted to determine if a trend indicative of change in HF state is discernible.
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Citations
30 Claims
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1. A method of operation of an implantable heart monitor implanted in a patient'"'"'s body having electrogram (EGM) sense electrodes coupled with EGM sense circuitry to generate sense events upon detection of cardiac depolarizations and a blood pressure measurement transducer disposed in a heart chamber and coupled with blood pressure measurement circuitry to assess heart failure state as a function of mechanical pulsus alternans (MPA) comprising:
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operating the blood pressure measurement transducer to make blood pressure measurements;
detecting the onset of an MPA episode of the patient'"'"'s heart from the blood pressure measurements;
determining at least one MPA characteristic of the MPA episode; and
assessing heart failure state from the MPA characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for operating an implantable heart monitor implanted in a patient'"'"'s body having electrogram (EGM) sense electrodes coupled with EGM sense circuitry to generate sense events upon detection of cardiac depolarizations and a blood pressure measurement transducer disposed in a heart chamber and coupled with blood pressure measurement circuitry to assess heart failure state as a function of mechanical pulsus alternans (MPA) comprising:
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means for operating the blood pressure measurement transducer to make blood pressure measurements;
means for detecting the onset of an MPA episode of the patient'"'"'s heart from the blood pressure measurements;
means for determining at least one MPA characteristic of the MPA episode suitable for assessing heart failure state. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification