Implantable cardiac stimulator with automatic gain control and b

Details Implantable cardiac stimulator with automatic gain control and b Implantable cardiac stimulator with automatic gain control and b

1988-06-07

1989-11-14

Jaworski, Francis

Surgery

Truss

Pad

A61N 100, H05G 0000

Patent

active

048800040

ABSTRACT:
An implantable cardiac stimulator for detecting and treating cardiac arrhythmias includes a sense amplifier responsive to sensed cardiac signals for detecting and distinguishing normal and abnormal cardiac activity within the sensed signals. The sense amplifier includes an automatic gain control amplifier, a filter and quad comparator having a pair of signal channels for processing the sensed signals according to different frequency bandpass characteristics to establish sensing thresholds, margins and signal gain. The sense amplifier has a feedback loop containing a microprocessor which implements preselected algorithms in conjunction with the outputs of the quad comparator to variably adjust the amplifier gain and to programmably control the sensing margin.

REFERENCES:
patent: 4406287 (1983-09-01), Nappholz et al.
patent: 4523595 (1985-06-01), Zibell
patent: 4554921 (1985-11-01), Boute et al.
patent: 4766902 (1988-08-01), Schroeppel
patent: 4768511 (1988-09-01), DeCote, Jr.
patent: 4774950 (1988-10-01), Cohen

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