Quantitative heart testing
First Claim
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1. A method comprising:
- using one or more electrodes placed on a patient, measuring one or more electrocardiograms associated with one or more respective leads;
converting the one or more electrocardiograms by time-frequency transform into one or more respective two-dimensional time-frequency maps;
identifying, within the one or more electrocardiograms, one or more points in time associated with a T wave;
determining, for at least one of the one or more time-frequency maps, one or more repolarization measures corresponding to extrema of the respective time-frequency map at the one or more points in time associated with the T wave; and
outputting at least one repolarization index based on the one or more repolarization measures.
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Abstract
Heart condition and function can be quantified using repolarization measures and/or repolarization indices derived from a time-frequency transform of an electrocardiogram, e.g., based on points in time associated with the T wave. The electrocardiograms, time-frequency maps derived therefrom, and/or indices obtained by analysis of the time-frequency maps and electrocardiograms may be assembled into a user interface. Further embodiments are described.
33 Citations
29 Claims
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1. A method comprising:
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using one or more electrodes placed on a patient, measuring one or more electrocardiograms associated with one or more respective leads; converting the one or more electrocardiograms by time-frequency transform into one or more respective two-dimensional time-frequency maps; identifying, within the one or more electrocardiograms, one or more points in time associated with a T wave; determining, for at least one of the one or more time-frequency maps, one or more repolarization measures corresponding to extrema of the respective time-frequency map at the one or more points in time associated with the T wave; and outputting at least one repolarization index based on the one or more repolarization measures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A heart test system comprising:
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an electrode interface configured to receive one or more electrocardiogram signals via one or more respective electrodes connectable to the electrode interface; and a processing facility communicatively coupled to the electrode interface, the processing facility comprising at least one computer processor and memory storing instructions for execution by the at least one computer processor, the instructions, when executed, causing the at least one computer processor to; generate, from the one or more electrocardiogram signals, one or more electrocardiograms for one or more respective leads; convert the one or more electrocardiograms by time-frequency transform into one or more respective two-dimensional time-frequency maps; identify, within the one or more electrocardiograms, one or more points in time associated with a T wave; determine, for at least one of the one or more time-frequency maps, one or more repolarization measures corresponding to extrema of the respective time-frequency map at the one or more points in time associated with the T wave; and output at least one repolarization index based on the one or more repolarization measures.
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Specification