Bi-spectral filtering of electrocardiogram signals to determine

Details Bi-spectral filtering of electrocardiogram signals to determine Bi-spectral filtering of electrocardiogram signals to determine

1990-11-13

1992-06-02

Kamm, William E.

Surgery

Truss

Pad

A61B 50452

Patent

active

051178338

ABSTRACT:
Method and apparatus for analyzing electrocardiogram signals to ascertain any defects or abnormalities in heart activity. Sensed, orthogonal x, y and z input signals are processed to obtain QRS onset and then passed through first and second spectral filters having respective passbands of 70-200 hertz and 40-200 hertz in order to establish QRS offset and accurate determinations of RMS voltage values and (LAS) low amplitude signals in the terminal QRS portion of the ECG signal. A spectral filtering of the x, y and z input signals with 150-250 hertz bandpass window also allows determination of certain high frequency activity in the midportions of the QRS.

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