Dual channel isolation system for cardiac pacer

Details Dual channel isolation system for cardiac pacer Dual channel isolation system for cardiac pacer

1982-05-05

1984-07-31

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

044624069

ABSTRACT:
To prevent crosstalk between atrial and ventricular channels in a dual chamber cardiac pacer with bipolar leads, the atrial and ventricular leads are multiplexed at about 2 kHz. This chopping rate is well above the sense amplifier's upper frequency response.
Solid state switches provide that during stimulation on a given channel, only the corresponding leads are connected. Between output pulses, only one of the bipolar lead pairs is connected to the pacer at any instant of time. Circuitry is included to provide break-before-make action. Thus, at no instant of time are both channel lead pairs connected to the pacer.

REFERENCES:
patent: 3135264 (1964-06-01), Tischler et al.
patent: 3669120 (1972-06-01), Nielsen
patent: 3773033 (1973-11-01), Robkard et al.
patent: 3815109 (1974-06-01), Carraway et al.
patent: 3903897 (1975-09-01), Woollons et al.
patent: 4248238 (1981-02-01), Joseph
patent: 4266551 (1981-05-01), Stein
patent: 4300566 (1981-11-01), Stindt et al.

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