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
a physiological analysis of a low-frequency component of said ECG signal, producing at least one physiological consideration,wherein 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
33 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 a physiological analysis of a low-frequency component of said ECG signal, producing at least one physiological consideration, wherein said alert comprises indicating ischemia. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of detecting an ischemic event, comprising:
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(a) having a computer scan a high frequency (HF) band of an ECG signal collected from a plurality of heartbeats to detect an instant variation in a value of at least one time-varying parameter, wherein said instant variation is a change in value of said parameter, compared to the parameter value at a short time before; (b) having a computer perform a physiological analysis of a low-frequency component of the ECG signal; and (c) having a computer identify a combination of the change and the analysis as being indicative of a potential ischemic event responsive to a decision algorithm comprising a set of rules. - View Dependent Claims (23, 24, 25, 26)
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27. 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 analyze low frequency components 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 components. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification