Cardiac pacer testing system

Details Cardiac pacer testing system Cardiac pacer testing system

1979-10-24

1981-10-20

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

042954681

ABSTRACT:
A hand-held, portable, battery-powered test instrument for evaluating the performance of cardiac pacer devices prior to the implantation thereof and afterwards. To test R-wave sensitivity of a pacer device, a series of simulated R-waves, each of a predetermined greater amplitude, is applied to the pacer unit under test, each such simulated R-wave occurring at a time following a preceding pacer pulse sufficient to ensure that the pacer's refractory period has elapsed. This process is continued until a succeeding pacer pulse does not occur at the time it would otherwise be due, thus indicating that the R-wave had just reached the amplitude sufficient to cause the resetting of the pacer pulse generator. A count is maintained of the number of cycles needed to cause resetting of the pacer pulse generator and this value is displayed to indicate, in terms of voltage, the minimum amplitude of the R-wave just sufficient to result in pacer resetting.

REFERENCES:
patent: 3669120 (1972-06-01), Nielsen
patent: 3800801 (1974-04-01), Gaillard
patent: 3830242 (1974-08-01), Greatbatch
patent: 3865119 (1975-02-01), Svensson et al.
patent: 4142533 (1979-03-01), Brownlee et al.

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