Mitral Valve Area (MVA) Calculator

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Choose the echocardiographic method that matches your available measurements. PHT and DT are the most common; use the continuity equation when PHT is unreliable.
Time for the peak diastolic transmitral pressure gradient to halve, measured on the Doppler spectral tracing. Normal < 60 ms; moderate stenosis 150-220 ms.
ms
Mitral Valve Area (MVA)Moderate stenosis
1.47cm²

Effective orifice area of the mitral valve

1.47 cm²
Severe<1Moderate1-1.5Mild / Normal1.5-4Normal4+

MVA is 1.47 cm² by the pressure half-time method - moderate mitral stenosis.

  • Moderate mitral stenosis usually causes exertional dyspnea. Hemodynamic significance often increases during tachycardia because diastolic filling time shortens.
  • ACC/AHA guidelines recommend annual echocardiographic follow-up and evaluation for intervention if symptomatic.

Next stepEvaluate for symptoms and exercise tolerance. Annual echo follow-up is recommended. Referral for balloon mitral valvuloplasty evaluation may be appropriate if symptomatic.

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