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!
E-Echo will be continuing to be available after this year! A new company is taking over.
Regurgitant Fraction by PISA
Calcs>Aortic Regurgitation>RF by PISA>1
SVAV = CSALVOT x VTIAV
SVAV = 0.785 x DLVOT2 x VTIAV
RVAR = EROAR x VITAR
RVAR = ((2 x pi x r2 x VA x alpha/ 180) / Vmax) x VTIAR
RFAR = RVAR / SVAV
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.
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.
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.
4: Obtain the angle of the PISA formation.
The angle is typically 180 degrees.