FujiFilm SonoSite X-Porte Manual Para El Usuario página 44

CSA = Cross Sectional Area of the orifice
VTI = Velocity Time Integral of the orifice
Aortic Valve Area (AVA) by Continuity Equation in cm2
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual. 3rd ed., Philadelphia: Lippincott, Williams, and
Wilkins, (2007), p.73 and p.191-195.
A = A * V /V
2 1 1 2
where:
A = A valve area;
2 o
A = LVOT area;
1
V = LVOT velocity;
1
V = A valve velocity; and
2 o
LVOT = Left Ventricular Outflow Tract
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