Measurement References - FujiFilm SonoLite S Serie Guia Del Usuario

3 Measure from LVOT (Doppler).
a On a frozen Doppler image, press the calcs key.
b From the Calculations menu, select AV, and then select LVOT VTI.
c Position the calipers.
d Save the calculation.
To calculate Aortic Valve Area (AVA)
The AVA calculation requires a measurement in 2D and two measurements in Doppler. After the
measurements are saved, the result appears in the patient report.
1 In 2D, measure from LVOT:
a On a frozen 2D image, press the calcs key.
b From the Calculations menu, select AV then LVOT D.
c Position the calipers.
d Save the calculation.
In Doppler, select AV, measure LVOT, and then measure the AV.

Measurement references

Aortic Valve Area (AVA) by Continuity Equation in cm
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition., Philadelphia: Lippincott, Williams, and
Wilkins, (2007), p.73, 191-195.
A = A * V /V
2 1 1 2
where:
A = Ao valve area
2
A = LVOT area(CSA)
1
V = LVOT velocity(VMax)
1
V = Ao valve velocity (VMax)
2
LVOT = Left Ventricular Outflow Tract
Pressure Gradient (PGr) in mmHG
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Philadelphia: Lippincott, Williams, and
Wilkins, (2007), p.63-66.
2
PGr = 4 * (Velocity)
6
2
Measurement references