Apparatus for observing cardiac rhythm free of interfering effec

Details Apparatus for observing cardiac rhythm free of interfering effec Apparatus for observing cardiac rhythm free of interfering effec

1977-02-04

1979-02-06

Kamm, William E.

Surgery

Truss

Perineal

128 206F, 128 21Z, 128419PT, A61B 504

Patent

active

041379080

ABSTRACT:
A cardiac rhythm observation apparatus that separates and then provides for correlation of cardiographic and electrocardiographic signals has four electrodes for attachment to the chest of a subject. Two of the electrodes connect a high-frequency current for application to the subject. The other two electrodes disposed between the first two are connected to a channel for detecting, filtering and forming a rheocardiographic signal, which channel is connected to a heartbeat counter proper. A channel for eliminating variations in pulmonary impedance is connected to the feed electrodes and delivers a pulmonary rheographic signal to a stage in the detecting channel in which the pulmonary rheographic signal is substracted from the raw rheographic signal. A correlation stage is provided for correlation either with the separated electrocardiographic signal or with stimulation pulses.

REFERENCES:
patent: 3677261 (1972-07-01), Day
patent: 3716059 (1973-02-01), Welborn et al.
patent: 3742936 (1973-07-01), Blanie et al.
patent: 3782367 (1974-01-01), Hochberg et al.

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