Analysis of electrocardiogram signals
First Claim
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1. Apparatus for graphical representation of a train of ECG complexes, each of said electrocardiogram (ECG) complexes respectively comprising an R wave and a T-P interval and having respectively variable isoelectric baselines, the apparatus comprising:
- electrodes;
an isoelectric alignment unit configured to obtain electrocardiogram (ECG) signals from said electrodes when said electrodes are placed on a subject and to carry out an alignment for each complex comprising aligning said complexes in terms of signal amplitude by obtaining a respective T-P interval for each ECG complex, using said T-P interval to infer said respective isolectric baseline and aligning said isoelectric baselines; and
a temporal alignment unit configured to align said complexes temporally using a predetermined point on respective R-waves, thereby to graphically represent said train of ECG complexes as a superposition of said ECG complexes into a single complex.
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Abstract
A method for graphical representation of a train of ECG complexes having an R wave and a T-P interval and having variable isoelectric baselines. The method involves aligning the complexes in terms of signal amplitude by obtaining a baseline, thereby to provide a graphical representation of said train of ECG complexes; and aligning said complexes temporally using corresponding predetermined points.
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Citations
17 Claims
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1. Apparatus for graphical representation of a train of ECG complexes, each of said electrocardiogram (ECG) complexes respectively comprising an R wave and a T-P interval and having respectively variable isoelectric baselines, the apparatus comprising:
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electrodes; an isoelectric alignment unit configured to obtain electrocardiogram (ECG) signals from said electrodes when said electrodes are placed on a subject and to carry out an alignment for each complex comprising aligning said complexes in terms of signal amplitude by obtaining a respective T-P interval for each ECG complex, using said T-P interval to infer said respective isolectric baseline and aligning said isoelectric baselines; and a temporal alignment unit configured to align said complexes temporally using a predetermined point on respective R-waves, thereby to graphically represent said train of ECG complexes as a superposition of said ECG complexes into a single complex.
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2. Apparatus for graphical representation of a train of ECG complexes, said ECG complexes respectively comprising an R wave and a T-P interval, each said ECG complex further comprising a respectively variable isoelectric baseline, the apparatus comprising:
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electrodes configured to be placed on a subject; an isoelectric alignment unit configured to obtain an overall alignment baseline for aligning all ECG complexes of said train, and to align said complexes to said overall alignment baseline, said isoelectric alignment unit configured to obtain said overall alignment baseline using irregular sampling of said electrodes to obtain varying isolectric baselines, said isoelectric alignment unit configured to provide splines for said irregular sampling; and a temporal alignment unit configured to carry out temporal aligning of said complexes using a predetermined point of respective complexes, thereby to provide said graphical representation of said train of ECG complexes. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification