Pulmonary Capillary Wedge Pressure by Tissue Doppler Echo
PCWP = 1.55 + 1.47(Emax/Emax')
to calculate a PCWP by TDI.
1: Obtain a PWD of the long axis view of the mitral
valve. The PWD will yield a E and A wave.
The maximum E wave velocity, Emax should be measured
and entered above.
Step 2: Obtain
a TDI scan of the mitral valve. A TDI
scan of the mitral valve is a tissue color mode scan
with pulse wave doppler of the mitral valve annulus.
After initiating the scan a velocity profile will
be exhibited that is similar to the PWD of the LVI.
An early velocity peak, the E´
and a late velocity peak, the A´
are present. The maximum velocity of the E´
velocity profile is the Emax´.
This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education through the joint providership of University of Nebraska Medical Center, Center for Continuing Education and JLS Interactive, LLC.
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.