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Mitral Valve Area by Pressure Half-Time (PHT)

Calculate
m/sec
Miral valve area: Infi cm²
MVA PHT
Formula:MVA = 220 / PHT

How to get Mitral Valve Area by Pressure Half-Time

  1. Obtain a PWD or a CWD of the mitral valve. The flow profile of the mitral valve will have a Vmax, typically the maximum velocity of the E wave. The time from the Vmax to the velocity equal to Vmax divided by 1.4 is the pressure half time. (Vmax / 1.4 is equivalent to the half pressure). 220 divided by the PHT is the mitral valve area.