User guide

Chapter 5: Measurement References 79
References
LVEDV = (7.0 * LVDD
3
)/(2.4 + LVDD)
where: LVEDV = Left Ventricular End
Diastolic Volume
LVDD = Left Ventricular
Dimension at Diastole
Left Ventricular Mass in gm
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual .
2nd Edition, Boston: Little, Brown and Company,
(1999), 39.
LV Mass = 1.04 [(LVID + PWT + IVST)
3
– LVID
3
] *
0.8 + 0.6
where: LVID = Internal Dimension
PWT = Posterior Wall Thickness
IVST = Interventricular Septal
Thickness
1.04 = Specific gravity of the
myocardium
0.8 = Correction factor
Left Ventricular Volume: Biplane Method in
ml
Schiller, N.B., P.M. Shah, M. Crawford, et.al.
“Recommendations for Quantitation of the Left
Ventricle by Two-Dimensional Echocardiography.”
Journal of American Society of Echocardiography .
September-October 1989, 2:362.
where: V = Volume in ml
a = Diameter
b = Diameter
n = Number of segments (n=20)
L = Length
i = Segment
Left Ventricular Volume: Single Plane
Method in ml
Schiller, N.B., P.M. Shah, M. Crawford, et.al.
“Recommendations for Quantitation of the Left
Ventricle by Two-Dimensional Echocardiography.”
Journal of American Society of Echocardiography .
September-October 1989, 2:362.
where: V = Volume
a = Diameter
n = Number of segments (n=20)
L = Length
i = Segment
Left Ventricular Dimension (LVD)
Fractional Shortening, percent
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual .
Boston: Little, Brown and Company, (1994),
43-44.
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
V
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