LVDS = Left Ventricular Dimension
at Systole
LVEDV = (7.0 * LVDD
3
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)
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
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.
n
L
-- -
-- -
V
=
a
b
i
i
4
n
i
=
1
where:
V = Volume in ml
a = Diameter
b = Diameter
n = Number of segments (n=20)
L = Length
i = Segment
)/(2.4 + LVDD)
3
– LVID
Left Ventricular Volume: Single Plane
Method in ml
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.
n
2
-- -
V
=
a
i
4
i
=
1
where:
V = Volume
a = Diameter
3
] *
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
Mean Velocity (Vmean) in cm/s
Vmean = mean velocity
L
-- -
n
Chapter 7: References
175