Electrocardiogram noise reduction using multi-dimensional filtering
AssigneeCambridge Heart, Inc.
InventorPaul Lander
Life of this patent
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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.
Claims37
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.
A method for measuring alternans in an ECG signal, the method comprising:
- 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.
A method for generating a localized ECG signal, the method comprising:
- 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.
A method for generating a collection of localized beats, the method comprising:
- 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.
A method for measuring an interval in an ECG signal, the method comprising:
- 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.
Dependencies are inferred from the claim text.