Non-invasive and continuous cardiac performance monitoring device
First Claim
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1. A non-invasive cardiac monitoring device for determining cardiac pumping performance of an individual, comprising:
- electrocardiogram sensing means for sensing and generating a signal indicative of an electrocardiogram waveform of the individual;
R-wave amplitude measuring means for measuring the amplitude of an R-wave component of the electrocardiogram waveform;
T-wave amplitude measuring means for measuring the amplitude of a T-wave component of the electrocardiogram waveform;
ratio calculating means for determining the ratio of the amplitude of the R-wave component to the amplitude of the T-wave component and for generating a ratio signal indicative of said ratio;
stroke volume calculating means for generating a stroke volume signal indicative of the stroke volume of an individual as a function of said ratio signal generated by the ratio calculating means; and
output means for displaying values of said ratio signal and said stroke volume signal.
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Abstract
A non-invasive cardiac monitoring device for calculating the cardiac performance parameters of heartbeat, stroke volume, and cardiac output for an individual. The device receives electrocardiogram waveform signals from the individual and calculates a ratio of the R-wave component of the electrocardiogram waveform to the T-wave of the electrocardiogram waveform. From this ratio, the stroke volume of the individual and the cardiac output of the individual may be calculated. The periodicity of subsequent electrocardiogram waveforms are utilized to calculate the heartbeat of the individual.
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Citations
17 Claims
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1. A non-invasive cardiac monitoring device for determining cardiac pumping performance of an individual, comprising:
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electrocardiogram sensing means for sensing and generating a signal indicative of an electrocardiogram waveform of the individual; R-wave amplitude measuring means for measuring the amplitude of an R-wave component of the electrocardiogram waveform; T-wave amplitude measuring means for measuring the amplitude of a T-wave component of the electrocardiogram waveform; ratio calculating means for determining the ratio of the amplitude of the R-wave component to the amplitude of the T-wave component and for generating a ratio signal indicative of said ratio; stroke volume calculating means for generating a stroke volume signal indicative of the stroke volume of an individual as a function of said ratio signal generated by the ratio calculating means; and output means for displaying values of said ratio signal and said stroke volume signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for monitoring the cardiac performance of an individual comprising the steps of:
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obtaining an electrocardiogram waveform of the individual; measuring the amplitude of an R-wave component of the electrocardiogram waveform; measuring the amplitude of a T-wave component of the electrocardiogram waveform; calculating a ratio of the amplitude of the R-wave component to the amplitude of the T-wave component; and calculating a value of stroke volume as a function of said ratio. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for monitoring the cardiac performance of an individual in a cardiac pulmonary rehabilitation program comprising the steps of:
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obtaining an electrocardiogram waveform of the individual; measuring the amplitude of an R-wave component of the electrocardiogram waveform; measuring the amplitude of a T-wave component of the electrocardiogram waveform; calculating a ratio of the R-wave component to the amplitude of the T-wave component; calculating a value of stroke volume as a function of said ratio; and using said value of stroke volume to generate a signal for monitoring a cardiac pulmonary rehabilitation program for said individual. - View Dependent Claims (17)
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Specification