Method and device for estimating a myocardial performance parameter
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United States of America Patent
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Jan 24, 2017
Grant Date -
Mar 31, 2016
app pub date -
Dec 8, 2015
filing date -
Aug 28, 2008
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Abstract
An implantable medical device applies an electric signal to at least a portion of a heart in a subject. A resulting electric signal is collected from the heart and is used together with the applied signal for determining a cardiogenic impedance signal. The impedance signal is processed in order to estimate an isovolumetric contraction time, an isovolumetric relaxation time and an ejection time for a heart cycle. These three time parameters are employed for calculating a Tei-index of the heart. The Tei-index can be used as myocardial performance parameter in heart diagnosis and/or cardiac therapy adjustment.
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