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!

Mitral Valve Area by PISA
Calcs>Mitral Stenosis>MVA by PISA>1

Arc Width (cm) cm
Arc Height (cm) cm
PISA Radius (r)(cm): cm
Aliasing Velocity (VA) cm /sec
Vmax (m/sec) m/sec
Angle () degrees
Mitral Valve Area cm2
How to calculate PISA radius from the PISA Arc width and height:
Sometimes it is difficult to determine the radius from the flow convergence formation arc to the center of the valve or the arc. Fortunately, if you can draw a line from one side of the arc to the other (the Arc Width) and then from the center of the line to the edge of the arc perpendicular to the width, the radius can be calculated (and may be more accurate, although not studied) from the arc width and height. Enter the values above and the radius is automatically calculated.
How to get an MVA by PISA.
Step 1: Obtain a Zoomed CFD of the MV in the mid esophageal view. If there is a sufficiently stenosed mitral valve, a PISA formation will occur.  The distance from the center of the PISA formation to it's first aliasing velocity edge (where the color shifts from blue to red) is the radius of the PISA formation.
Step 2: Note the aliasing velocity. The aliasing velocity is the velocity where if the flow exceeds this velocity the flow will be displayed with colors from the opposite scale. 
Step 3: Obtain a continuous wave doppler (CWD) of the mitral valve. The CWD of the mitral valve will yield a flow profile where, utilizing the calipers (or you can trace it) to show the peak velocity.
Step 4: Obtain an angle of the PISA formation: The angle at the mitral valve is typically 120 degrees, whereas the angle for the aortic valve (for aortic stenosis calculations) is typically 180 degrees.
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.