The severity of mitral stenosis (MS) can be determined using Doppler echocardiography.
Parameters:
(1) mitral valve area in square centimeters
(2) diastolic half-time in milliseconds
(3) mean gradient between the left atrium and left ventricle in mm Hg during diastole
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Mitral Valve Area in square cm
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Diastolic half-time in msec
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Gradient LA to LV in mm Hg
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Severity of MS
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>= 1.51 sq cm
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<= 149 msec
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<= 4 mm Hg
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mild
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1.00 - 1.50 sq cm
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150 - 220 msec
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5 - 10 mm Hg
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moderate
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<= 0.99 sq cm
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>= 221 msec
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>= 11 mm Hg
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severe
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