Method and system for evaluating valvular function
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United States of America Patent
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Dec 6, 2011
Grant Date -
Jul 19, 2007
app pub date -
Dec 14, 2005
filing date -
Dec 14, 2005
priority date (Note) -
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Abstract
A method and apparatus for enhancing evaluation of valvular function in terms of regurgitation is described. The techniques include a method and apparatus for monitoring flow across a valve and evaluating regurgitation through the valve. An ultrasound scanner with Doppler capabilities processes and represents Doppler signal data in a color scale. The Doppler signal data is processed such that different colors are assigned to signals that have different power levels. An ECG signal may be correlated to the Doppler signals to determine systole and diastole periods, then the regurgitation is determined by estimating a peak reverse blood flow based on Doppler signals from blood at systole. The Doppler signals may also be processed so as to determine a cardiac cycle, then regurgitation is determined as the ratio of a reverse blood flow as a percentage of a forward blood flow.
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