Mitral valve area — pressure half-time

Mitral valve area in mitral stenosis by the empirical pressure half-time method (220/PHT).

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Height

Weight

Heart rate

bpm

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Pressure half-time

MVA = 1.47 cm²

Moderate range (1.0–1.5)

Worked steps

Empirical pressure half-time method
MVA = 220 ÷ PHT = 220 ÷ 150 ms = 1.47 cm²

Reference: The 220/PHT constant is empirical and invalid immediately after valvuloplasty, with significant AR, or abnormal LV/LA compliance. ASE/EACVI valvular stenosis recommendations (2017).

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