Cardiac arrhythmia analysis system

Details Cardiac arrhythmia analysis system Cardiac arrhythmia analysis system

1982-05-24

1984-05-08

Kamm, William E.

Surgery

Truss

Pad

307358, A61B 504

Patent

active

044468687

ABSTRACT:
A method and apparatus for analyzing cardiac electrical activity and producing a signal representative of the occurrence of a QRS complex. A signal representative of cardiac electrical activity is analyzed by an analog circuit that compares the sum of the rectified and low-pass filtered signal plus the derivative of the signal to a reference level, and compares the rectified and filtered signal to a threshold level, to identify QRS complexes while largely ignoring ventricular fibrillation, and produces an output pulse representative of the occurrence of a QRS complex.

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Nat'l Semiconductor Linear Application Handbook (1980) pp. AN20-8 and AN20-9.
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Applications of Operational Amplifiers, Gerald Graeme, pp. 111-112, 1973.

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