Implantable cardiac pacer with discontinuous microprocessor programmable antitachycardia mechanisms and patient data telemetry
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United States of America Patent
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Dec 31, 1985
Grant Date -
N/A
app pub date -
Oct 17, 1983
filing date -
Oct 17, 1983
priority date (Note) -
Expired
status (Latency Note)
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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.
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