Digital cardiac pacemaker with threshold margin check

Details Digital cardiac pacemaker with threshold margin check Digital cardiac pacemaker with threshold margin check

1978-11-06

1981-06-16

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

042731321

ABSTRACT:
There is disclosed herein a programmable cardiac pacemaker pulse generator utilizing digital circuitry for controlling the provision of cardiac stimulating pulses. The pulse generator is capable of having the rate, the pulse width, the pulse amplitude, the refractory period, the sensitivity and the mode of operation programmed. In addition, the pulse generator can have the output inhibited and can respond to programming signals causing a threshold margin test to be performed, accomplished by threshold safety margin means responsive to a programmed test signal for causing a series of stimulating pulses to be provided a rate different than the previously programmed rate with at least one of the stimulating signals having its energy reduced a predetermined amount. Capture at the reduced energy can be monitored by external equipment.

REFERENCES:
patent: 3618615 (1971-11-01), Greatbatch
patent: 3635224 (1972-02-01), Berkovits
patent: 3669120 (1972-06-01), Nielsen
patent: 3833005 (1974-09-01), Wingrove
patent: 3837348 (1974-09-01), Thaler
patent: 3865119 (1975-02-01), Svensson et al.
patent: 4132233 (1979-01-01), Hartlaub

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