Apparatus and method for identifying myocardial ischemia using analysis of high frequency QRS potentials
First Claim
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1. A method for analyzing ECG signals, comprising:
- (a) providing at least one ECG signal recorded from a body;
(b) having a computer determine the value of at least one time-varying parameter of a high frequency band of said ECG signal; and
(c) having a computer generate an alert responsive to a decision algorithm comprising a set of rules involving a combination of;
an instant variation of the time-varying parameter value during a test, wherein said instant variation is a change in the parameter value in comparison to the parameter value at a short time before; and
an analysis of a T-wave abnormality in at least one QRS complex in a low-frequency component of said ECG signal,wherein;
said analysis of said low-frequency component of said ECG signal is performed in addition to any alignment of high frequency signals from said high frequency band of said ECG signal; and
said alert comprises indicating ischemia.
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Abstract
Detecting cardiac ischemia by detecting local changes in high frequency ECG parameters. Local changes may be, for example, local reduction in RMS of high frequency components, for example, during a stress test.
33 Citations
18 Claims
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1. A method for analyzing ECG signals, comprising:
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(a) providing at least one ECG signal recorded from a body; (b) having a computer determine the value of at least one time-varying parameter of a high frequency band of said ECG signal; and (c) having a computer generate an alert responsive to a decision algorithm comprising a set of rules involving a combination of; an instant variation of the time-varying parameter value during a test, wherein said instant variation is a change in the parameter value in comparison to the parameter value at a short time before; and an analysis of a T-wave abnormality in at least one QRS complex in a low-frequency component of said ECG signal, wherein; said analysis of said low-frequency component of said ECG signal is performed in addition to any alignment of high frequency signals from said high frequency band of said ECG signal; and said alert comprises indicating ischemia. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for ECG signal analysis, comprising:
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(a) an input for an ECG signal; (b) a high-frequency band extractor which extracts a high frequency (HF) band from said signal; (c) a filter configured to analyze said HF band and detect an instant variation, wherein said instant variation is a change in value of a time-varying parameter in comparison to the parameter value at a short time before; (d) a processor configured to perform analysis of a T-wave component in at least one QRS complex in a low frequency component of said ECG signal, producing at least one physiological consideration; and (e) an output which generates an output signal responsive to a decision algorithm comprising a set of rules involving a combination of the instant variation and the analysis of the low frequency component, wherein said analysis of said low-frequency component of said ECG signal is performed in addition to any alignment of high frequency signals from said high frequency band of said ECG signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification