Defaults: 1X 2X 3X 4X      
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Effective Regurgitant Orifice by PISA
Mitral Regurgitation
Calcs>Mitral Regurgitation>ERO by PISA>1
Calculator
Radius
cm
Vmax m/sec
VA cm/sec
Angle degrees
 
ERO cm2

 
How to get a Regurgitant Volume in Aortic Regurgitation.
 
Step 1:  Obtain a CFD of the MR Jet with a good PISA formation under zoomed view.  The ME 3CV, ME 4CV, ME 2CV, or ME AVLAX are good views.  Use the view with the largest and high quality PISA formation.
 
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.
 

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