Method and system for remote hemodynamic monitoring
First Claim
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1. A method for calculating a ventricular performance value, said method comprising:
- measuring a change in ventricular pressure at two points in the cardiac cycle;
measuring a change in a myocardial contraction force at corresponding points in the cardiac cycle; and
determining the ventricular performance value based at least in part on a ratio between the measured changes in ventricular pressure and myocardial contraction force.
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Abstract
A cardiac sensor system includes implanted cardiac sensor assemblies and an external controller which receives information from the implanted sensors. The sensors permit direct measurement of a number of physiologic parameters. The external controller permits calculation of a variety of performance values based on the measured physiological parameters. Optionally, patient oxygen consumption can be measured externally and combined with the internally measured physiologic parameters in order to calculate a variety of unique performance values.
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Citations
31 Claims
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1. A method for calculating a ventricular performance value, said method comprising:
- measuring a change in ventricular pressure at two points in the cardiac cycle;
measuring a change in a myocardial contraction force at corresponding points in the cardiac cycle; and
determining the ventricular performance value based at least in part on a ratio between the measured changes in ventricular pressure and myocardial contraction force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- measuring a change in ventricular pressure at two points in the cardiac cycle;
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12. A method for calculating a hypertrophy value characteristic of a patient'"'"'s heart, said method comprising:
- determining a cardiac output value;
measuring a myocardial thickness change at two points in the cardiac cycle; and
determining the hypertrophy value based at least in part on the ratio of cardiac output value and the measured myocardial thickness change. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
- determining a cardiac output value;
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21. A method for calculating a ventricular performance value, said method comprising:
- measuring a change in ventricular pressure at two points in the cardiac cycle;
measuring a change in a myocardial thickness at corresponding points in the cardiac cycle; and
determining the ventricular performance value based at least in part on a ratio between the measured changes in ventricular pressure and myocardial thickness. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- measuring a change in ventricular pressure at two points in the cardiac cycle;
Specification