Method and apparatus for the measurement and analysis of cardiac rates and amplitude variations
First Claim
1. A method for measuring selected instantaneous patient heart pulse parameters comprising the steps of:
- taking heartbeat readings on the patient;
detecting at least two of the P, R and T pulses for each heartbeat;
determining the times at which each detected pulse occurs; and
storing as a time series the times of each of the detected pulses for successive heartbeats.
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Abstract
A method and apparatus are provided for measuring selected patient heartbeat parameters such as heartrates and amplitude variations, for processing the measured parameters to place them in more usable form and for analyzing measured and processed heartbeat parameters to obtain certain useful information concerning the condition of the patient'"'"'s cardiac function. Measurement preferably involves detection and storage of at least two of the P, R and T pulses for each heartbeat and the conversion of such information into time series for selective heartrates. Indicators δj are computed for selected ones of the time series for selected values of j and the computed δj '"'"'s are then compared against stored δj values to obtain a measure of the state of cardiac function. The time series are preferably notched, detrended and normalized prior to being analyzed.
97 Citations
41 Claims
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1. A method for measuring selected instantaneous patient heart pulse parameters comprising the steps of:
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taking heartbeat readings on the patient; detecting at least two of the P, R and T pulses for each heartbeat; determining the times at which each detected pulse occurs; and storing as a time series the times of each of the detected pulses for successive heartbeats. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for analyzing a measured heartbeat parameter comprising the steps of:
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converting the measured heartbeat parameter into a time series; deriving selected Indicator values for the time series; and
corresponding stored Indicator values. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. Apparatus for measuring selected instantaneous patient heart pulse parameters comprising:
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means for taking heartbeat readings on the patient; means for detecting at least two of the P, R and T pulses for each heartbeat; means for determining the time at which each detected pulse occurs; and means for storing as a time series the times of each of the detected pulses for successive heartbeats. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. Apparatus for analyzing a measured heartbeat parameter comprising:
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means for converting the measured heartbeat parameter into a time series; means for deriving Indicator values δ
j for the time series; andmeans for comparing the derived Indicator values against a corresponding stored Indicator value. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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Specification