Method and system for cardiac signal decomposition
First Claim
1. A method of analyzing an electrocardiogram (ECG) signal, the method comprising:
- receiving the ECG signal;
segmenting the received ECG signal into a set of cycle segments;
aligning the set of cycle segments along a relative time axis to obtain aligned cycle segments;
generating a set of cross-sectional signals from the aligned cycle segments, wherein each cross-sectional signal is a time-slice signal representing a cross-section of the aligned cycle segments along a relative time of the aligned cycle segments, said each cross-sectional signal corresponding to a different relative time;
separating, using a signal separation process, the set of cross-sectional signals into a set of statistically substantially independent components; and
detecting, using the set of components, an abnormal cardiac signal;
wherein the steps of receiving, segmenting, aligning, generating, separating, and detecting are performed by a processor-based cardiac signal detection system.
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Abstract
A method and system decomposes a cardiac signal, such as an electrocardiogram (ECG) signal, into components. The components are then usable to assist in the detection of an abnormal heart condition. More particularly, a single lead sensor is used to generate a single lead cardiac signal. The cardiac signal is segmented into a set of cycle segments according to detected heart waveforms. The cycle segments are aligned and used to generate a set of cross-sectional signals. The cross-sectional signals are aligned and presented as inputs to a signal separation process, which separates the cardiac signal into a set of components. The components may be grouped according to predefined criteria. The components or groups may be analyzed or displayed to assist in the detection of an abnormal cardiac signal, which may be indicative of an abnormal heart condition. In one example, the signal separation process is a non-orthogonal transformation method such as independent component analysis (ICA).
18 Citations
18 Claims
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1. A method of analyzing an electrocardiogram (ECG) signal, the method comprising:
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receiving the ECG signal; segmenting the received ECG signal into a set of cycle segments; aligning the set of cycle segments along a relative time axis to obtain aligned cycle segments; generating a set of cross-sectional signals from the aligned cycle segments, wherein each cross-sectional signal is a time-slice signal representing a cross-section of the aligned cycle segments along a relative time of the aligned cycle segments, said each cross-sectional signal corresponding to a different relative time; separating, using a signal separation process, the set of cross-sectional signals into a set of statistically substantially independent components; and detecting, using the set of components, an abnormal cardiac signal; wherein the steps of receiving, segmenting, aligning, generating, separating, and detecting are performed by a processor-based cardiac signal detection system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification