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Regurgitant Flow Rate by PISA
Aortic Regurgitation
Calcs>Aortic Regurgitation>RFR>1
Calculator
Radius
cm
VA cm/sec
Angle degrees
Heart Rate bpm
 
RFR ml/min

Regurgitant Flow Rate

 
How to get a Regurgitant Volume in Aortic Regurgitation.
 
Step 1:  Obtain a CFD of the AR Jet with a good PISA formation under zoomed view.  The DTG AVLAX, TG AVLAX, or ME AVLAX views should provide a good PISA formation.  The DTG view is optimal for the CWD mode also.
 
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 the angle of the PISA formation. The angle is typically 180 degrees.
 

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