Electrocardiogram noise reduction using multi-dimensional filtering
First Claim
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1. A method for reducing noise from an ECG signal representative of activity of the heart of a patient, the method comprising:
- altering a physiologic condition of a patient using non-surgical techniques to stress the heart of the patient;
receiving an ECG signal representative of activity of the heart of the patient whose physiologic condition is altered, the ECG signal including a sequence of beats;
selecting a collection of beats from the ECG signal;
transforming the collection of beats into a multi-dimensional representation; and
applying a multi-dimensional filter function to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of beats.
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Abstract
Noise is reduced from a received ECG signal representative of activity of the heart of a patient. A collection of beats from the ECG signal is selected and transformed into a multi-dimensional representation. A multi-dimensional filter function is applied to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of beats.
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Citations
37 Claims
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1. A method for reducing noise from an ECG signal representative of activity of the heart of a patient, the method comprising:
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altering a physiologic condition of a patient using non-surgical techniques to stress the heart of the patient; receiving an ECG signal representative of activity of the heart of the patient whose physiologic condition is altered, the ECG signal including a sequence of beats; selecting a collection of beats from the ECG signal; transforming the collection of beats into a multi-dimensional representation; and applying a multi-dimensional filter function to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of beats. - 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, 29, 30, 31)
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32. A method for measuring alternans in an ECG signal, the method comprising:
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receiving an ECG signal representative of activity of a heart of a patient, the ECG signal including a sequence of beats; selecting a collection of beats from the ECG signal; transforming the collection of beats into a multi-dimensional representation; applying a multi-dimensional filter function to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of beats; and generating a measure of alternans from the enhanced collection of beats.
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33. A method for generating a localized ECG signal, the method comprising:
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receiving an ECG signal representative of activity of a heart of a patient, the ECG signal including a sequence of beats; selecting a collection of beats from the ECG signal; transforming the collection of beats into a multi-dimensional representation; applying a multi-dimensional filter function to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of beats; and generating a localized ECG signal from the enhanced collection of beats.
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34. A method for generating a collection of localized beats, the method comprising:
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receiving an ECG signal representative of activity of a heart of a patient, the ECG signal including a sequence of beats; generating a localized ECG signal from the received ECG signal; selecting a collection of localized beats from the localized ECG signal; transforming the collection of localized beats into a multi-dimensional representation; and applying a multi-dimensional filter function to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of localized beats.
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35. A method for measuring an interval in an ECG signal, the method comprising:
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receiving an ECG signal representative of activity of a heart of a patient, the ECG signal including a sequence of beats; selecting a collection of beats from the ECG signal; transforming the collection of beats into a multi-dimensional representation; applying a multi-dimensional filter function to the multi-dimensional representation to enhance a signal-to-noise ratio of the collection of beats; and generating a measure of the interval from the enhanced collection of beats. - View Dependent Claims (36, 37)
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Specification