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LV
mass (truncated ellipsoid) (2D)
1.05 p
{(b + t)2 x [2/3 x (a
+ t) + d - [d3 / 3 x (a
+ t)2]] - b2 x [2/3 a + d
- (d3 / 3 x a2)]}
(gm)
(Schiller et al,
1989)
 A
Copyright © 2001 Paolo Barbier
 B
Copyright © 2001 Paolo Barbier
Left
ventricular hypertrophy index (M-mode)
h/r = [(PWTd + IVSTd) /2] / (EDD / 2)
(Reicheck et
al., 1982)
Normal range: 0.33 - 0.41
Left ventricular mass index (M-mode)
LVMI= (1.05 x [(EDD + PWTd + IVSTd)3 -
EDD3] -
13.6) / BSA (g/m2)
(Devereux et
al., 1977)
Normal
values
Left ventricular geometry pattern in
hypertrophy
Concentric remodeling
- LVMI <= 50 gm/m2; h/r >= 0.44
Normal
- LVMI <= 50 gm/m2; h/r < 0.44
Concentric hypertrophy
- LVMI > 50 gm/m2; h/r >= 0.44
Eccentric hypertrophy
- LVMI > 50 gm/m2; h/r < 0.44
Spherical
index (2D)
EDV / [(LAD3 x p)
/ 6]
(Kono et al.,
1991) - (Lamas et al, 1989)
Long/short axis ratio (2D)
Long axis / Short axis
(Kono et al.,
1991)
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A. Transthoracic parasternal short axis view
Red: tracing of pericardial border
to obtain A1
Green: tracing of endocardial border (papillary muscles are excluded)
to obtain A2
Am = A1 - A2 = area of myocardium
t: myocardial thickness (automatically calculated by the software)
LV mass index (truncated ellipsoid)
normal values:
Males: 76±13 gm/m2
Females: 66±11 gm/m2
(Helak et al,
1981)
B.
Transthoracic subcostal 4-chamber view
a: semi-major axis from widest minor
axis radius (b) to apex
b: short axis radius
d:truncated semi-major axis from widest minor axis radius (b) to
mitral anulus plane.
LA: left atrium
RA: right atrium
RV: right ventricle
BSA: body surface area (m2)
EDD: LV end-diastolic diameter (cm)
ESD: LV end-systolic diameter (cm)
IVSTd: Interventricular diastolic thickness (cm)
PWTd: LV postero-lateral diastolic wall thickness (cm)
PWTs: LV postero-lateral systolic wall thickness (cm)
SAP: systolic arterial pressure (mmHg)
EDV: End-diastolic volume, ml
LAD: Long axis, cm
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