Methods and apparatus for R-wave detection
First Claim
1. A method of detecting a plurality of R-waves of an ECG signal of a patient, comprising the steps of:
- storing the ECG signal of the patient;
storing a blood pressure signal of the patient; and
detecting the R-waves of the ECG signal of the patient in response to the stored ECG signal and the stored blood pressure signal.
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Accused Products
Abstract
Apparatus and methods for determining the precise times of occurrence of R-waves in an ECG signal of a patient. Samples of the patient'"'"'s ECG signal are accumulated and an ECG window comprising a predetermined number of the samples is defined. In accordance with one embodiment of the invention, the patient'"'"'s blood pressure signal is processed to detect systoles and the ECG window has a predetermined time relationship to detected systoles. In accordance with an alternative embodiment, the ECG signal is first processed to approximate the times of occurrence of R-waves and the ECG window is defined to have a predetermined time relationship to the approximated R-wave times. ECG signal samples within the ECG window are processed to determine a maximum and the time of occurrence of the maximum is stored as the time of an R-wave event.
59 Citations
10 Claims
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1. A method of detecting a plurality of R-waves of an ECG signal of a patient, comprising the steps of:
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storing the ECG signal of the patient; storing a blood pressure signal of the patient; and detecting the R-waves of the ECG signal of the patient in response to the stored ECG signal and the stored blood pressure signal. - View Dependent Claims (2, 3, 4)
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5. Apparatus for detecting a plurality of R-waves of an ECG signal of a patient comprising:
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a memory for storing the ECG signal of the patient and a blood pressure signal of the patient; and a processor responsive to the stored ECG signal and the stored blood pressure signal for detecting the R-waves of the ECG signal. - View Dependent Claims (6, 7, 8)
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9. A method of detecting a plurality of R-waves of an ECG signal of a patient, comprising the steps of:
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storing the ECG signal of the patient; storing a blood pressure signal of the patient; detecting the R-waves of the ECG signal of the patient in response to the stored ECG signal and the stored blood pressure signal, said detecting step including the steps of; detecting approximate times of the R-waves of the ECG signal in response to the stored blood pressure signal; and detecting precise times of the R-waves of the ECG signal in response to the stored ECG signal and the approximate times of the R-waves.
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10. Apparatus for detecting a plurality of R-waves of an ECG signal of a patient comprising:
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a memory for storing the ECG signal of the patient and a blood pressure signal of the patient; and a processor responsive to the stored ECG signal and the stored blood pressure signal for detecting the R-waves of the ECG signal, said processor including; a first processor portion for detecting approximate times of the R-waves in response to the stored blood pressure signal; and a second processor portion for detecting precise time of the R-waves in response to the stored ECG signal and the approximate times of the R-waves.
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Specification