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Tricuspid Valve Area by Decelleration Time (DT)
Calcs>Tricuspid Stenosis>TVA by DT>1
to get an TVA BY DT.
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 where the velocity is
equal to zero is the deceleration time. Typically,
the curve will have to be extrapolated to the zero
velocity. The tricuspid valve area is equal
to 655 divided by the deceleration time.
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The University of Nebraska Medical Center, Center for Continuing Education is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians.
This activity is approved by the American Society of Radiologic Technologists (ASRT) as sonography-related continuing education (CE). Credit(s) issued for successful completion of ASRT-approved CE activities are accepted by the American Registry of Diagnostic Medical Sonography, American Registry of Radiological Technologists, Cardiovascular Credentialing International and Canadian Association of Registered Diagnostic Ultrasound Professionals. Contact the applicable registry for additional information / restrictions on their acceptance of ASRT CE credit.