Dual channel coherent fibrillation detection system
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United States of America Patent
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Jan 24, 1989
Grant Date -
N/A
app pub date -
Mar 13, 1987
filing date -
Mar 13, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A tachyarrhythmia/fibrillation detector in which the Widrow-Hoff LMS algorithm is utilized for estimation of a transfer function. One or more LMS cancellers are placed between two separate sensing electrode pairs placed in or on the heart and by noting the convergence of the error signal or the lack thereof the type of tachyarrhythmia or a ventricular fibrillation condition can be discerned. With sinus rhythm, the error signal is small in power compared to the power of the desired response. With ventricular fibrillation, however the filter weights are unable to converge to cause the filter output signal to track desired signal and the filter output waveform becomes asynchronous with the desired response, yielding a detectably high error power.
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