System and method for monitoring diastolic function using an implantable medical device
First Claim
1. A method for use with an implantable medical device for implant within a patient, the method comprising:
- detecting ventricular repolarization evoked response (ER) morphological parameters within the patient;
determining parameters representative of diastolic function for the patient from the ventricular repolarization ER morphological parameters; and
controlling at least one device function based on the parameters representative of diastolic function.
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Abstract
Diastolic function is monitored within a patient using a pacemaker or other implantable medical device. In one example, the implantable device uses morphological parameters derived from the T-wave evoked response waveform as proxies for ventricular relaxation rate and ventricular compliance. In particular, the magnitude of the peak of the T-wave evoked response is employed as a proxy for ventricular compliance. The maximum slew rate of the T-wave evoked response following its peak is employed as a proxy for ventricular relaxation. A metric is derived from these proxy values to represent diastolic function. The metric is tracked over time to evaluate changes in diastolic function. In other examples, specific values for ventricular compliance and ventricular relaxation are derived for the patient based on the T-wave evoked response parameters.
9 Citations
27 Claims
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1. A method for use with an implantable medical device for implant within a patient, the method comprising:
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detecting ventricular repolarization evoked response (ER) morphological parameters within the patient; determining parameters representative of diastolic function for the patient from the ventricular repolarization ER morphological parameters; and controlling at least one device function based on the parameters representative of diastolic function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for use with an implantable medical device for implant within a patient, the system comprising:
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a ventricular repolarization evoked response (ER) morphological parameter detection unit operative to detect ventricular repolarization ER morphological parameters within the patient; and a diastolic function determination unit operative to determine parameters representative of diastolic function for the patient from the ventricular repolarization ER morphological parameters. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method for use with an implantable medical device for implant within a patient, the method comprising:
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detecting ventricular repolarization evoked response (ER) morphological parameters within the patient; and monitoring diastolic function within the patient using the ventricular repolarization ER morphological parameters.
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Specification