Mitral Valve Area (MVA) by Pressure Half Time

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Data Acquisition

MVA by Pressure Half Time (PHT)

Reference Values

Mitral Stenosis Severity MVA (cm2)
Normal 4.0-5.0
Mild 1.5-4.0
Moderate 1.0-1.5
Severe <1.0


\[MVA = \frac{220}{PHT}\]


PHT Pressure half-time
MVA Mitral valve area


1. Baumgartner H, et al. Echocardiographic assessment of valve stenosis: EAE/ASE recommendations for clinical practice. J Am Soc Echocardiogr. 2009 Jan;22(1):14, 17. Full text


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Developer & Illustrator: Sirikarn Napan, MD, FACC