Circuit for measuring the sensitivity of a cardiac pacer

Details Circuit for measuring the sensitivity of a cardiac pacer Circuit for measuring the sensitivity of a cardiac pacer

1976-03-15

1977-05-10

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 63, G01R 2700

Patent

active

040230953

ABSTRACT:
A circuit for measuring the sensitivity of a cardiac pacer includes a generator for producing a signal which varies as a function of the sine.sup.2 of a predetermined frequency. The signal is generated by an intermediate step of generating a waveform having the value of 1/2 [1-COS(.theta./2)]. The waveform is applied to an input of a cardiac pacer, and the amplitude varied in a measurable manner. The output of the cardiac pacer is observed in response to the signals applied to its input, and the amplitude of the voltage waveform which just inhibits the operation of the pacer is directly read from the amplitude varying control.

REFERENCES:
patent: 3566286 (1971-02-01), Freeman
patent: 3676774 (1972-07-01), Stokes et al.
patent: 3927368 (1975-12-01), Zielonko et al.

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