FujiFilm SonoSite Edge II User Manual page 125

Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Philadelphia: Lippincott Williams and Wilkins,
(2007), 115.
LVDFS = ((LVDD – LVDS)/LVDD) * 100%
where:
LVDD = Left Ventricle Dimension at Diastole
LVDS = Left Ventricle Dimension at Systole
Left Ventricular Posterior Wall Fractional Thickening (LVPWFT), percent
Laurenceau, J. L., M.C. Malergue. The Essentials of Echocardiography. Le Hague: Martinus Nijhoff, (1981), 71.
LVPWFT = ((LVPWS – LVPWD)/LVPWD) * 100%
where:
LVPWS = Left Ventricular Posterior Wall Thickness at Systole
LVPWD = Left Ventricular Posterior Wall Thickness at Diastole
Mean Velocity (Vmean) in cm/s
Vmean = mean velocity
Mitral Valve Area (MVA) in cm
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Philadelphia: Lippincott, Williams, and Wilkins,
(2007), 73-74.
MVA = 220/PHT
where: PHT = Pressure Half Time
Note 220 is an empirical derived constant and may not accurately predict mitral valve area in
mitral prosthetic heart valves. The mitral valve area continuity equation may be utilized
in mitral prosthetic heart valves to predict effective orifice area.
MV Flow Rate in cc/sec
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Boston: Philadelphia: Lippincott Williams and
Wilkins, (2007), 74-76.
Flow = PISA * Va
where:
PISA = Proximal Isovelocity SurfaceArea
Measurement publications and terminology
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