Mindray DC-8 EXP Operator's Manual page 118

The LV Mass (A-L) is calculated.
If height and weight have been input already, LV Mass-I(A-L) is calculated.
LV Mass (T-E)
Study Items
Tools
Left Ventricular Epicardial Area at Papillary
LVAd sax Epi
Muscle level at end-diastole in Short-axis view
Left Ventricular Endocardial Area at Papillary
LVAd sax Endo
Muscle level at end-diastole in Short-axis view
Semi-major axis from widest minor axis radius to
a
apex
Truncated semi-major axis from widest minor
d
axis radius to mitral annulus plane
Study Results
Except for values in upper table, the following results can be obtained in this study:
Tools
LV Mass (T-E) Left Ventricular Mass
Index of Left
LV MASS-I (T-E)
Ventricular Mass
*1 means:
LV Mass(g)
Where, units of a, b, d, t are cm.
a: Semi-major axis from widest minor axis radius to apex
d: Truncated semi-major axis from widest minor axis radius to mitral annulus plane
t: Thickness of the myocardium
t (cm)
b: Short axis radius, usually measured where the radius is largest.
Operating Procedures
1. Select [LV Mass(T-E)] in the measurement menu.
2. In short-axis view at papillary muscle level at end diastole, measure the following parameters:
Endocardium area: LVAd sax Endo;
Epicardium area LVAd sax Epi
3. Measure a and d.
The LV Mass(T-E) is calculated.
If height and weight have been input already, LV Mass-I(T-E) is calculated.
6-26 Cardiology
Descriptions
Descriptions
2(a
π
= × ×
2
1.05 { (b + t) [
=
(LVAd sax Epi(cm
=
b(cm) (LVAd
Formulae
*1
See LV Mass-I formula in "Left Ventricular Mass (LV
Mass)"
+
3
t) d
+ - d ] b -
2
3 3(a + t)
π
2
/ ) - ) (LVAd Sax Endo(cm
π
2
Sax Endo(cm )/ )
Operations
Area in 2D General
Measurements
Distance in 2D General
Measurements
3
2a d
×
2
( + - d )}
2
3 3a
π
2
)/ )