Device for analyzing the function of a heart
First Claim
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1. An apparatus for analyzing the function of a heart comprising:
- measurement means for measuring a heart variable and for generating a measurement signal related to said heart variable;
parameter signal generator means for generating a parameter signal related to a heart variable, said parameter signal and said measurement signal having related values; and
evaluation means for identifying and analyzing said related values of said measurement signal and said parameter signal and for generating an analysis result indicative of the functioning of said heart by plotting said measurement signal against said parameter signal to obtain a curve having a morphology and a chronological course, and means for analyzing said morphology and chronological course of said curve.
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Abstract
A device for analyzing the function of a heart, containing a measurement unit for generating a first measurement signal related to a first electrical or mechanical heart variable and an evaluation unit for evaluating the measurement signal, further contains a circuitry for generating a parameter signal related to a heart variable, the evaluation unit analyzing the related values for the measurement signal and the parameter signal. The device can be used for detecting a number of functional aberrations, such as bradycardia, tachyarrhythmia, retrograde conduction, ischemia and ectopia, and for controlling pacemakers and defibrillators.
101 Citations
28 Claims
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1. An apparatus for analyzing the function of a heart comprising:
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measurement means for measuring a heart variable and for generating a measurement signal related to said heart variable; parameter signal generator means for generating a parameter signal related to a heart variable, said parameter signal and said measurement signal having related values; and evaluation means for identifying and analyzing said related values of said measurement signal and said parameter signal and for generating an analysis result indicative of the functioning of said heart by plotting said measurement signal against said parameter signal to obtain a curve having a morphology and a chronological course, and means for analyzing said morphology and chronological course of said curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An apparatus for analyzing the function of a heart comprising:
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measurement means for measuring a heart variable and for generating a measurement signal related to said heart variable; parameter signal generator means for generating a parameter signal related to a heart variable, said parameter signal and said measurement signal having related values; evaluation means for identifying and analyzing said related values of said measurement signal and said parameter signal and for generating an analysis result indicative of the functioning of said heart; and averaging means for continuously calculating an average of at least one of said related values over a predetermined period of time. - View Dependent Claims (25, 26, 27)
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28. An apparatus for analyzing the function of a heart comprising:
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measurement means for measuring impedance in a heart for generating an impedance signal; parameter signal means for generating a parameter signal by differentiating said impedance signal; means for plotting said impedance signal against said parameter signal to obtain a curve; arc length calculator means for calculating an arc length of said curve for each cardiac cycle of said heart; a plurality of comparators to which the calculated arc length is supplied, each comparator comparing the calculated arc length to a respectively different predetermined arc length and each comparator generating an output signal if the calculated arc length exceeds the respective predetermined arc length; and computer means for determining whether said heart is hemodynamically stable based on the outputs of said comparators.
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Specification