Cardiac rhythm management system and method using time between mitral valve closure and aortic ejection
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United States of America Patent
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Nov 8, 2005
Grant Date -
Sep 18, 2003
app pub date -
Mar 13, 2002
filing date -
Mar 13, 2002
priority date (Note) -
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Abstract
This document discusses cardiac rhythm management systems and methods using the MVC-to-AE time between mitral valve closure ('MVC') and aortic ejection ('AE') of the same heart contraction, sometimes referred to as the isovolumic contraction time ('ICVT'). In one example, the MVC-to-AE time is used for predicting which patients will respond to cardiac resynchronization therapy (CRT), or other therapy. In another example, the MVC-to-AE time is used as a wellness indicator. In a further example, the MVC-to-AE time is used to select or control a therapy or therapy parameter. In one example, the MVC and AE are obtained using an accelerometer signal, however, plethysmography, tonometry, or other techniques may alternatively be used.
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