Analyzing alternans from measurements of an ambulatory electrocardiography device
AssigneeCambridge Heart, Inc.
InventorsAli Haghighi-Mood, Lahn Fendelander, Richard J. Cohen
Life of this patent
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Abstract
Cardiac signal data of heart beats measured with an ambulatory electrocardiography device is accessed. The cardiac signal data is segmented into cardiac signal data segments such that each cardiac signal data segment includes cardiac signal data of sequential heart beats. Whether alternans is present in the cardiac signal data segment is determined for each of multiple cardiac signal data segments. Characteristics of the alternans is determined by analyzing cardiac signal data segments for which alternans is determined to be present or by analyzing characteristics of cardiac signal data segments for which alternans is determined to be present.
Claims40
A method comprising:
- accessing cardiac signal data of heart beats measured with an ambulatory electrocardiography device;
- segmenting the cardiac signal data into cardiac signal data segments, each cardiac signal data segment including cardiac signal data of sequential heart beats;
- determining, for each of multiple cardiac signal data segments, whether alternans is present in the cardiac signal data segment;
- and
- determining characteristics of the alternans by analyzing cardiac signal data segments for which alternans is determined to be present or characteristics of cardiac signal data segments for which alternans is determined to be present.
A computer-readable medium encoded with a computer program comprising instructions that, when executed, operate to cause a computer to perform operations comprising:
- accessing cardiac signal data of heart beats measured with an ambulatory electrocardiography device;
- segmenting the cardiac signal data into cardiac signal data segments, each cardiac signal data segment including cardiac signal data of sequential heart beats;
- determining, for each of multiple cardiac signal data segments, whether alternans is present in the cardiac signal data segment;
- and
- determining characteristics of the alternans by analyzing cardiac signal data segments for which alternans is determined to be present or characteristics of cardiac signal data segments for which alternans is determined to be present.
A system comprising:
- sensors configured to measure electrical activity of heart beats;
- an amplifier configured to amplify the electrical activity measured by the sensors;
- an analog to digital converter configured to convert the electrical activity measured by the sensors to digital signals;
- and
- a processor configured to:
- receive the digital signals,
- generate cardiac signal data segments, each cardiac signal data segment including cardiac signal data of sequential heart beats,
- determine, for each of multiple cardiac signal data segments, a characteristic pertaining to the cardiac signal data segment, and
- store, for each of the multiple cardiac signal data segments, the generated cardiac signal data segment along with the determined characteristic pertaining to the cardiac signal data segment.
Dependencies are inferred from the claim text.