LV Mass = 1.05 * {[(5/6) * A1 * (a + d + t)] - [(5/6) * A2 * (a + d)]}
where:
A1 = Short axis area, diastole (Epi)
A2 = Short axis area, diastole (Endo)
a = Long or semi major axis
d = Truncated semi major axis from the widest short axis diameter to mitral annulus plane
t = Myocardial thickness
Left Ventricular Mass in gm for M Mode
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)
where:
LVID = Internal Dimension
PWT = Posterior Wall Thickness
IVST = Interventricular Septal Thickness
1.04 = Specific gravity of the myocardium
0.8 = Correction factor
Safety
Electrical safety
WARNING
Safety
3
3
– LVID
] * 0.8 + 0.6
To avoid the risk of electrical shock, do not allow any part of the system
(including the bar code scanner, external mouse, power supply, power supply
connector, external keyboard, and so on), except for the transducer or ECG
leads, to touch the patient.
3