Dual-use sensor for rate responsive pacing and heart sound monitoring
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United States of America Patent
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Jul 24, 2007
Grant Date -
May 12, 2005
app pub date -
Nov 6, 2003
filing date -
Nov 6, 2003
priority date (Note) -
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Abstract
An implantable medical device includes a dual-use sensor such as a single accelerometer that senses an acceleration signal. A sensor processing circuit processes the acceleration signal to produce an activity level signal and a heart sound signal. The implantable medical device provides for rate responsive pacing in which at least one pacing parameter, such as the pacing interval, is dynamically adjusted based on the physical activity level. The implantable medical device also uses the heart sounds for pacing control purposes or transmits a heart sound signal to an external system for pacing control and/or diagnostic purposes.
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