Cardiac rhythm management system with time-dependent frequency response
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United States of America Patent
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Jul 19, 2011
Grant Date -
Aug 26, 2004
app pub date -
Jul 10, 2003
filing date -
Mar 12, 1999
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Abstract
A cardiac rhythm management system includes a time-dependent frequency response for sensed heart signals. A change in the frequency response of a sensing circuit is triggered by a sensed or evoked event to make it less sensitive to the detection of a subsequent event for a period of time. For example, a passband bandwidth is reduced, then increased during the time period triggered by the event. For even more event-triggered selectivity, a gain is reduced, then increased during the time period triggered by the event. This provides better discrimination between particular events included in a heart signal so that appropriate therapy can be delivered to the patient based such events.
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