Teichholz calculator & LV mass index

Parasternal long axis

M-mode

Weight, kg

Height, centimeter

BSA, m2 (if known)

LV mass, g

LV mass index, g/m2

Relative wall thickness

LVEF (%)

IVSd, centimeter

LVPWd, centimeter

LVIDd, centimeter

LVIDs, centimeter

Sex

Male

Female

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Teichholz formula

1) Measure the left ventricular diameter during end-diastole and end-systole.

2) The formula is as follows

LV volume = LV Volume = [7/(2.4 + LVID)] * LVID

The TEICH methods rely on the assumption that the LV is a prolate ellipsoid based on the cubic (CUBE) equation. The precision of this method relies on the accuracy of the geometric assumptions regarding the shape of the left ventricle.

3) LVEF = 100* [(Vd-Vs) / Vd]

3

Left ventricular mass index and relative wall thickness

The formulas used are the following:

LV Mass (Cube formula) = 0.8 x (1.04 x (((LVEDD + IVSd +PWd) - LVEDD ))) + 0.6
LVMI (LV Mass Indexed to Body Surface Area) = LV Mass / BSA
RWT (Relative Wall Thickness) = 2 x PWd / LVEDD

For BSA, Mosteller’s formula is employed: BSA = (((Height in cm) x (Weight in kg))/ 3600)

Relative wall thickness (RWT) allows classification of LV mass increase as either:

Concentric hypertrophy (RWT >0.42);
Eccentric hypertrophy (RWT ≤0.42).

3

1/2

References

Lang RM, Badano LP, Mor-Avi V, Afilalo J, Armstrong A, Ernande L, et al. Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. Journal of the American Society of Echocardiography [Internet]. 2015 Jan 1 [cited 2025 Jun 18];28(1):1-39.e14. Available from: https://doi.org/10.1016/j.echo.2014.10.003

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