Myocardial performance assessment
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United States of America Patent
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Sep 14, 2004
Grant Date -
Oct 17, 2002
app pub date -
Nov 15, 2001
filing date -
Nov 17, 2000
priority date (Note) -
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Abstract
Myocardial performance is assessed using a combination of electrical and mechanical criteria. More specifically, this assessment may be based on a QT interval based on electrogram (EGM) readings and on first and second heart sounds. The timing relationships between the QT interval and the first and second heart sounds can be used to evaluate certain systolic, diastolic, and systolic/diastolic parameters relating to myocardial performance. In addition, these parameters may be used to automatically drive therapies. For example, myocardial performance parameters obtained from the QT interval and from the timing of the first and second heart sounds may be used to optimize the AV delay and to optimize multisite pacing.
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