FujiFilm SonoSite SII, User Manual Supplement

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Measurement references 39
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Qp/Qs
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.70-72.
Qp/Qs = SV Qp site/SV Qs site = RVOT SV/LVOT SV
where: RVOT SV = RVOT CSA* RVOT VTI = π/4 * RVOT diameter
2
* RVOT VTI
LVOT SV = LVOT CSA * LVOT VTI = π/4 * LVOT diameter
2
* LVOT VTI
Regurgitant Fraction (RF) in percent
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.215-217.
RF = RV/ MV SV
where: RV = Regurgitant Volume
MV SV = Mitral Stroke Volume (Mitral CSA * Mitral VTI)
Mitral CSA = cross-sectional area calculated using annulus diameter
Regurgitant Volume (RV) in cc
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Lippincott, Williams, and Wilkins, (2007),
p.215-217.
RV = ERO * MR VTI/100
Right Atrial Volume
Lang, R., M. Bierig, R. Devereux, et al. “Recommendations for chamber quantification: a report from the
American Society of Echocardiography’s guidelines and standards committee and the chamber
quantification writing group, Developed in conjunction with the European Association of Echocardiography,
a branch of the European Society of Cardiology.” J
ournal of the American Society of Echocardiograph.
2005, 18: p.1440-1463.
RA Vol = π/4 *
Σ(
ai) * ai * L/20 for i = 1 to 20 (number of segments)
where: RA Vol = Right Atrial Volume in ml
ai = diameter of chamber view slice i
L = length of the chamber view