Detecting fiducial points in physiological signals
First Claim
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1. A method for identifying a QRS complex in an electrocardiogram (ECG), the method comprising:
- decomposing the ECG into subcomponents;
selecting a subset of the subcomponents based upon a degree of overlap of spectral energy, in at least one of the subcomponents, with expected spectral energy of the QRS complex of the ECG;
combining at least two of the subcomponents in the subset;
comparing the combined subcomponents to a threshold; and
identifying the location of the QRS complex in the ECG based on the comparing.
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Abstract
Various aspects are directed to identifying a region of interest in a physiological signal. As may be consistent with one or more embodiments, the physiological signal is decomposed into subcomponents, and a subset of the subcomponents is selected based upon overlap of spectral energy with expected spectral energy of the region of interest, in at least one of the subcomponents. At least two of the subcomponents in the subset are combined and compared to a threshold, with the comparison being used to identify the location of the region of interest.
66 Citations
26 Claims
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1. A method for identifying a QRS complex in an electrocardiogram (ECG), the method comprising:
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decomposing the ECG into subcomponents; selecting a subset of the subcomponents based upon a degree of overlap of spectral energy, in at least one of the subcomponents, with expected spectral energy of the QRS complex of the ECG; combining at least two of the subcomponents in the subset; comparing the combined subcomponents to a threshold; and identifying the location of the QRS complex in the ECG based on the comparing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
a computer-based circuit configured and arranged with a plurality of modules for identifying a QRS complex in an electrocardiogram (ECG), the modules including a decomposing module configured and arranged to decompose the ECG into subcomponents; a selection module configured and arranged to select a subset of the subcomponents based upon a degree of overlap of spectral energy, in at least one of the subcomponents, with expected spectral energy of the QRS complex of the ECG; a combiner module configured and arranged to combine at least two of the subcomponents in the subset; a comparator module configured and arranged to compare the combined subcomponents to a threshold; and an identifier module configured and arranged to identify the location of the QRS complex in the ECG based on the comparing. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
Specification