Defaults: 1X 2X 3X 4X      
Pssst! It's me, the website.

I just wanted to let you know that even though I'm looking quite old, I'm still a millenial.
So I just had a "New Year, New Me" moment and my resolution is to become a new and improved version of myself in a couple of weeks.
Don't worry, my wisdom won't change. You're still going to find the same useful information here. Stay tuned!

Regurgitant Volume by Continuity Equation
Pulmonary Regurgitation
Calcs>Pulmonary Regurgitation>RV by CE>1
TV Diameter
RVOT Diameter cm
TV CSA cm2
TV SV mls
RV mls

TV and RVOT Diameters



How to get a Regurgitant Volume in Pulmonary Regurgitation.
Step 1: Measure the Diameter of the RVOT. The diameter can be of the RVOT should be obtained from the midesophageal RVIO view, in mid systole, and under the zoom mode.  The view of the RVOT should not be an obtuse angle view.  The pulmonic valve leaflets should be clearly seen.  The zoom mode will decrease the error present in the calculation.  Since the RVOT diameter changes throughout systole, the mid systole measurement should be obtained. 
Step 2: Obtain a VTI of the RVOT.    The VIT of the RVOT is obtained from a PWD of the RVOT.   The PWD of the RVOT should be obtained at the same locatio n as the RVOT diameter measurement.  The PWD beam should not be off more than 15º from parallel to the RVOT flow.  After tracing the flow on the echocardiographic machine, a VTI of the PWD tracing will be calculated.  A continuous wave doppler (CWD) of the RVOT could be obtained, but, since the CWD introduces ambiguity into the equation and since flows in the RVOT rarely exceed the aliasing velocity of the pulse wave doppler, PWD is the best measurement mode.  However, in aortic regurgitation, there is excessive flow, so aliasing may occur.  Therefore, CWD may be required to be able to trace the whole flow profile.
Step 3: Obtain a Tricuspid Valve Diameter. The area of the tricuspid valve can be calculated from this measurement.  This enter some inaccuracy into the equation since the mitral valve is not a circle (it is oval).  Therefore, the aortic valve could be used instead.  This measurement is to be used to generate a value that represents normal forward flow in the cardiac cycle.
Step 4:  Obtain a Tricuspid Valve VTI.  Using the PWD mode, trace the envelope of the entire (E wave and A wave) flow profile of the tricuspid valve.

Previous Page
Next Page
Instution Info  
User Info  
CME Info  
User License  
Privacy Policy  
Copyright Statement
© Copyright 2000-2023 JLS Interactive, LLC.
Content from this web site may not be used or reproduced for non-personal or
commercial purposes without express written permission by JLS Interactive, LLC.