Method and apparatus for analyzing and interpreting electrocardiograms using spectro-temporal mapping
First Claim
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1. The system for evaluating a electrocardiogram (ECG) of a patient which comprises:
- means for calculating from the ECG and storing digital data defining a three dimensional graphic surface representative of the spectral frequency of the ECG in which the first axis is the time domain of the ECG, the second axis is the frequency domain, and the third axis is representative of the amplitude or power domain;
means for displaying the surface in a three dimensional visually discernible presentation; and
means for producing visually discernible indicia on the surface selected to reveal predetermined characteristics of the HRECG useful in medically evaluating the patient.
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Abstract
Method and apparatus for analyzing ECG signal data for diagnostic purposes by performing an incrementally moving, short window FFT analysis to produce a set of spectral templates representative of the spectral frequency content of the ECG at each window position. The spectral templates may be displayed as a representation of a three dimensional surface or mathematically analyzed. The changes in the shape of the templates or surface with time represent a change in the spectrum, which are shown to be an indication of abnormalities in the heart.
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28 Claims
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1. The system for evaluating a electrocardiogram (ECG) of a patient which comprises:
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means for calculating from the ECG and storing digital data defining a three dimensional graphic surface representative of the spectral frequency of the ECG in which the first axis is the time domain of the ECG, the second axis is the frequency domain, and the third axis is representative of the amplitude or power domain; means for displaying the surface in a three dimensional visually discernible presentation; and means for producing visually discernible indicia on the surface selected to reveal predetermined characteristics of the HRECG useful in medically evaluating the patient. - 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, 24, 25, 26, 27, 28)
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Specification