Acquisition circuit for cardiac pacer

Details Acquisition circuit for cardiac pacer Acquisition circuit for cardiac pacer

1984-03-07

1985-11-05

Kamm, William E.

Surgery

Truss

Pad

128697, 128903, A61N 136

Patent

active

045507317

ABSTRACT:
An acquisition circuit for a cardiac pacer includes an oscillator for producing an externally generated magnetic signal at a first predetermined frequency. An implantable cardiac pacer has a tuned inductor coil to be responsive to the magnetic signal for developing an induced signal with a phase-shift. Light-emitting devices are responsive to the magnetic signal and the induced signal are provided for transmitting optical signals which change gradually from flashing to a steady on condition when the telemetry head is moved closer to and adequately positioned over the cardiac pacer to indicate that positive acquisition has been obtained.

REFERENCES:
patent: 3942535 (1976-03-01), Schulman
patent: 4082097 (1978-04-01), Mann et al.
patent: 4324251 (1982-04-01), Mann
patent: 4361153 (1982-11-01), Slocum et al.

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