Mitral Valve Area by PISA

Data Acquisition

Coming soon..

Reference Values

MVA (cm2)
Normal4.0-5.0
Mild1.5-4.0
Moderate1.0-1.5
Severe<1.0

Formula

\[MVA = \pi r^2 \times \frac{V_{aliasing}}{V_{mitral}} \times \frac{\alpha}{180^{\circ}} \]

Abbreviations

rRadial distance from orifice when calculating proximal isovelocity hemispheric surface area
ValiasingAliasing velocity at the radial distance r
Peak VmitralPeak velocity of the mitral regurgitant jet
αAngle between two mitral leaflets on the atrial side
MVAMitral valve area

Referrence

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