Implantable cardiac pacer with programmable antitachycardia mech

Details Implantable cardiac pacer with programmable antitachycardia mech Implantable cardiac pacer with programmable antitachycardia mech

1987-12-17

1989-10-24

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

048754838

ABSTRACT:
A multi-programmable ROM-less cardiac pacer employs an intermittent microprocessor turned ON and OFF by a pacer timer clockwise independent of the processor to time intervals preset by the processor. Sensed activity and external communications restart the processor with an interrupt request. Five antitachycardia mechanisms are externally programmable: programmed burst, burst rate scanning, automatic overdrive, programmed critically timed and critically timed scanning. In scanning mechanisms, the interval changes progressively until the tachycardia is terminated by a successful interval which is stored. Runaway protection is executed in the software. For telemetry, the pacer collects the following monitored pacing data over a programmable period of time: percent pacing, average rate, maximum rate, number of tachycardia episodes and maximum tachycardia duration.

REFERENCES:
patent: 4181133 (1980-01-01), Kozenik
patent: 4202341 (1980-05-01), Blaser
patent: 4398536 (1983-08-01), Nappholz et al.
patent: 4424812 (1984-01-01), Gesnick
patent: 4503857 (1985-03-01), Boute et al.

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