Defaults: 1X 2X 3X 4X      
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Tricuspid Valve Area by PHT
Calcs>Tricuspid Stenosis>TVA by PHT>1
PHT msec
Tricuspid Valve Area cm2

How to get an TVA BY PHT.
Step 1: Obtain a PWD or a CWD of the tricuspid valve. The flow profile of the tricuspid 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).  190 divided by the PHT is the tricuspid valve area.

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