Regurgitant Fraction by PISA
Tricuspid Regurgitation
· Dr. Kenneth Gross ·
UNMC Advertisement
  Decrease Font Size  Default Font Size  Increase Font Size
Log In ·  Subscribe
Calcs>Tricuspid Regurgitation>RF by PISA>1
Jet VTI cm
Vmax m/sec
VA cm/sec
Angle degrees
TV Diameter cm
ERO cm2
RV mls
SV mls
RF %



ERO = 2 * pi * r2 * VA * angle / 180 / Vmax


SV = 0.785 * TV Diameter2 * TV-VTI

RF = RV / SV

How to get a Regurgitant Fraction in Tricuspid Regurgitation.
Step 1:  Obtain a CFD of the TR Jet with a good PISA formation under zoomed view.  The ME 4CV, ME RVIO, or ME BCV with the best and largest PISA formation should be used.
Step 2: Measure the Diameter of the PISA radius. The radius is from the center of the PISA formation, typically from the center of the valve, to the first aliasing velocity.  If the PISA is small, try slightly decreasing the aliasing velocity (VA) which will increase the size of the PISA formation.
Step 3: Obtain a VTI of the Regurgitant Jet by CWD.    From the flow profile the Vmax and the VTI of the regurgitant jet can be obtained by tracing the diastolic flow profile.
Step 4: Obtain the angle of the PISA formation. The angle is typically 180 degrees.
Step 5: Obtain the Diameter of the Ticuspid Valve.
Step 6: Obtain the VTI of the Tricuspid Valve by CWD.

Previous Page   Next Page
User Comments
Add Page Comment
Add a Comment to the Page
Page Link/Topic:  
Compliment Comment Compliment Compliment Criticism Criticism Information Information
This page is not yet rated. Please be the first to rate it!
Rate This Page:                      
Previous Page Next Page
Be a Sponsor Contribute Content/Videos Advertisement Information
This page was generated in 0.006 seconds.