Methods and apparatus for R-wave detection
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United States of America Patent
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-
Dec 12, 2000
Issued Date -
N/A
app pub date -
Oct 26, 1999
filing date -
Oct 1, 1997
priority date (Note) -
Expired
status (Latency Note)
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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.
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