Hemodynamic stability assessment based on heart sounds
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United States of America Patent
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Aug 24, 2010
Grant Date -
Oct 11, 2007
app pub date -
Mar 29, 2006
filing date -
Mar 29, 2006
priority date (Note) -
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Abstract
A system comprising an implantable medical device (IMD). The IMD includes an implantable sensor operable to produce an electrical signal representative of mechanical activity of a heart of a subject and a controller circuit coupled to the sensor. The IMD also includes a heart sound sensor interface circuit to produce a heart sound signal, a tachyarrhythmia detector, and a controller circuit. The controller circuit includes a hemodynamic stability assessment module configured to determine that at least one episode of ventricular tachyarrhythmia is detected in a subject and obtain a measurement of hemodynamic stability of the ventricular tachyarrhythmia from the heart sound signal.
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