Implantable cardiac device having an impedance monitoring circuit and method
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United States of America Patent
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Dec 2, 2003
Grant Date -
N/A
app pub date -
Aug 29, 2001
filing date -
Aug 29, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit within an implantable cardiac stimulation device monitors impedance of an electrode configuration including first and second electrodes in electrical contact with a heart. The circuit is within the implantable cardiac stimulation device which applies stimulation pulses having a current and a voltage magnitude across the electrode configuration. The circuit that monitors impedance of an electrode configuration provides an impedance digital output proportional to the ratio of a stimulation pulse voltage and current.
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