Alternans and cardiac ischemia
AssigneeCambridge Heart, Inc.
InventorsLahn Fendelander, Ali Haghighi-Mood, Richard J. Cohen
Life of this patent
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Abstract
One or more electrocardiographic signals are detected from a subject. The occurrence of alternans in the electrocardiographic signals are detected using one or more processors. One or more characteristics of detected alternans are determined. The determined characteristics of the detected alternans are analyzed to determine whether cardiac ischemia is present.
Claims48
A method for detecting cardiac ischemia, the method comprising:
- receiving one or more electrocardiographic signals from a subject;
- detecting, using at least one processor, the occurrence of alternans in the electrocardiographic signals;
- determining one or more characteristics of detected alternans;
- and
- analyzing the determined characteristics of the detected alternans to determine whether cardiac ischemia is present.
A computer-readable medium encoded with a computer program comprising instructions that, when executed, operate to cause one or more computers to perform operations, the operations comprising:
- receiving cardiac signal data generated from measured heart beats of a subject;
- detecting the occurrence of alternans in the cardiac signal data;
- determining one or more characteristics of detected alternans in the cardiac signal data;
- and
- providing an indication related to cardiac ischemia based on the determined characteristics of detected alternans.
A system comprising:
- sensors configured to measure electrical activity of heart beats;
- an amplifier configured to amplify the electrical activity;
- an analog to digital converter configured to convert the electrical activity to cardiac signal data;
- and
- a processor configured to:
- receive the cardiac signal data generated from measured heart beats of a subject,
- detect the occurrence of alternans in the cardiac signal data,
- determine one or more characteristics of detected alternans in the cardiac signal data, and
- provide an indication related to cardiac ischemia based on the determined characteristics of detected alternans.
A method for detecting cardiac ischemia, the method comprising:
- receiving first cardiac signal data generated from measured heart beats of a subject;
- determining characteristics of alternans occurring in the first cardiac signal data;
- receiving second cardiac signal data generated from measured heart beats of the subject after the subject has undergone a change relating to cardiac stress;
- determining characteristics of alternans occurring in the second cardiac signal data;
- analyzing a difference between the characteristics of alternans occurring in the first cardiac signal data and the characteristics of alternans occurring in the second cardiac signal data;
- and
- providing an indication related to cardiac ischemia based on the analyzed difference between the characteristics of alternans.
Dependencies are inferred from the claim text.