FujiFilm SONOSITE X-PORTE, User Manual

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6-4 Measurement references
Measurement publications and terminology
The following are the publications and terminology used for each calculation result.
Terminology and measurements comply with American Institute of Ultrasound in Medicine (AIUM)
published standards.
Cardiac references
Acceleration (ACC) in cm/s
2
Zwiebel, W.J. Introduction to Vascular Ultrasonography . 4th ed., W.B. Saunders Company, (2000), p.52.
ACC = abs (delta velocity/delta time)
Acceleration Time (AT) in msec
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Lippincott, Williams, and Wilkins, (2007),
p.147-148.
[time a - time b]
where:
time a = early time;
time b = later time;
only valid when [a] > [b]
Aortic Valve Area (AVA) by Continuity Equation in cm
2
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Lippincott, Williams, and Wilkins, (2007), p.73
and p.191-195.
A
2
= A
1
* V
1
/V
2
where:
A
2
= A
o
valve area
A
1
= LVOT area;
V
1
= Peak LVOT velocity (VMax) or LVOT VTI
V
2
= Peak A
o
valve velocity (VMax) or A
o
VTI
LVOT = Left Ventricular Outflow Tract
Body Surface Area (BSA) in m
2
Grossman, W. Cardiac Catheterization and Angiography . Philadelphia: Lea and Febiger, (1980), p.90.
BSA = 0.007184 * Weight
0.425
* Height
0.725
Weight = kilograms
Height = centimeters