Implantable cardiac stimulator with circuitry for removing noise in sensed electrical signals
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United States of America Patent
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Jun 24, 2003
Grant Date -
N/A
app pub date -
Jul 20, 2000
filing date -
Jan 20, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An implantable medical device, such as a cardiac stimulator, has a noise cancelling circuit which cancels noise signals relating to body movements which originate outside of the heart, and which are sensed between a noise sensing electrode located outside of the heart and the indifferent electrode of the stimulator housing. The noise cancelling circuit cancels these noise signals from the electrical signals which originate within the heart and which are sensed between the tip electrode of a stimulator lead and the indifferent electrode of the stimulator housing.
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