Surgery – Diagnostic testing – Cardiovascular
Patent
1996-11-07
1999-03-02
Kamm, William E.
Surgery
Diagnostic testing
Cardiovascular
600502, 600503, A61B 5024, A61B 502
Patent
active
058763503
ABSTRACT:
A convenient low-cost heart rate monitor. In one embodiment, a digital filter structure includes a low pass filter having a notch at 60 Hz and a bandpass filter which amplifies signals in a frequency range from 10-40 Hz and has a notch at 60 Hz. This digital filter has a recursive structure and uses integer coefficients to simplify and speed up the calculations. A four bit microcontroller may implement the digital filter. The output of the digital filter is subject to enhancement signal processing to emphasize QRS complexes indicative of human heartbeats.
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Lo Thomas Ying-Ching
Tsai Yuh Show
Kamm William E.
Layno Carl H.
Salutron, Inc.
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