Monitoring ventricular contractions using an implantable stimulation device
First Claim
1. A method for use with an implantable cardiac stimulation device, the method comprising:
- collecting plethysmogram data from a location outside the bloodstream during at least one cardiac cycle;
determining ventricular pressure data for the at least one cardiac cycle; and
processing the plethysmogram data as a function of the pressure data to produce data corresponding to a ventricular contraction loop.
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Accused Products
Abstract
An implantable cardiac stimulation device is configured to measure selected ventricular contraction parameters and possibly apply stimulation therapy based on the ventricular contraction parameters. In accordance with one aspect, the ventricular contraction parameters include impedance values that correspond to the volume of fluid in the right ventricle and the left ventricle. In accordance with another aspect, the ventricular contraction parameters include motion values that correspond to heart sounds/motion in the right ventricle and the left ventricle. The ventricular contraction parameters can be used to form pseudo P-V loop from which treatment decisions can be made.
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Citations
18 Claims
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1. A method for use with an implantable cardiac stimulation device, the method comprising:
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collecting plethysmogram data from a location outside the bloodstream during at least one cardiac cycle; determining ventricular pressure data for the at least one cardiac cycle; and processing the plethysmogram data as a function of the pressure data to produce data corresponding to a ventricular contraction loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable cardiac stimulation device comprising:
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means for collecting plethysmogram data from a location outside the bloodstream during at least one cardiac cycle; means for determining ventricular pressure data for the at least one cardiac cycle; and means for processing the plethysmogram data as a function of the pressure data to produce data corresponding to a ventricular contraction loop. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification