LV Dimensions & Mass Index Reference Values

Echo Reference — Chamber Quantification

LV Dimensions & Mass

Indexed LV end-diastolic and end-systolic dimensions, interventricular septum and posterior wall thickness, and LV mass index severity grading by linear and 2D methods. Normal values by sex.

Reference Tables Indexed LVM Calculator

Indexed LV Dimensions — Severity Grading

LV internal dimensions are measured from 2D-guided M-mode or direct 2D at the tips of the mitral valve leaflets in the parasternal long-axis view at end-diastole and end-systole. Values are indexed to BSA.

Men

Parameter	Mildly Abnormal	Moderately Abnormal	Severely Abnormal
ILVEDD (cm/m²)	3.1 – 3.3	3.4 – 3.6	> 3.6
ILVESD (cm/m²)	2.2 – 2.3	2.4 – 2.5	> 2.5

Women

Parameter	Mildly Abnormal	Moderately Abnormal	Severely Abnormal
ILVEDD (cm/m²)	3.2 – 3.4	3.5 – 3.7	> 3.7
ILVESD (cm/m²)	2.2 – 2.3	2.4 – 2.6	> 2.6

LV Wall Thickness — Severity Grading

Interventricular septum (IVS) and posterior wall (PW) thickness measured at end-diastole in the parasternal long-axis view. Not indexed to BSA.

Men

Parameter	Normal	Mildly Abnormal	Moderately Abnormal	Severely Abnormal
IVS (cm)	0.6 – 1.0	1.1 – 1.3	1.4 – 1.6	> 1.6
PW (cm)	0.6 – 1.0	1.1 – 1.3	1.4 – 1.6	> 1.6

Women

Parameter	Normal	Mildly Abnormal	Moderately Abnormal	Severely Abnormal
IVS (cm)	0.6 – 0.9	1.0 – 1.2	1.3 – 1.5	> 1.5
PW (cm)	0.6 – 0.9	1.0 – 1.2	1.3 – 1.5	> 1.5

LV Mass Index — Severity Grading

LV mass can be calculated by the linear method (ASE cube formula) or the 2D method (area-length or truncated ellipsoid). Both are indexed to BSA. Note the different reference ranges for each method.

Men

Method	Normal	Mildly Abnormal	Moderately Abnormal	Severely Abnormal
Linear ILVM (g/m²)	49 – 115	116 – 131	132 – 148	> 148
2D ILVM (g/m²)	50 – 102	103 – 116	117 – 130	> 130

Women

Method	Normal	Mildly Abnormal	Moderately Abnormal	Severely Abnormal
Linear ILVM (g/m²)	43 – 95	96 – 108	109 – 121	> 121
2D ILVM (g/m²)	44 – 88	89 – 100	101 – 112	> 112

Clinical context: Increased LV mass index is an independent predictor of cardiovascular events. LVH should be classified by geometry pattern using relative wall thickness (RWT = 2 × PW / LVEDD): RWT > 0.42 with increased mass = concentric LVH; RWT ≤ 0.42 with increased mass = eccentric LVH; RWT > 0.42 with normal mass = concentric remodelling.

Indexed LV Mass Calculator

Enter IVS, LVEDD, PW (all at end-diastole), sex, and either BSA or height + weight. Calculates LV mass by the ASE linear method (cube formula), indexes to BSA, grades severity, and calculates relative wall thickness with geometry classification.

IVS (cm)

LVEDD (cm)

PW (cm)

Sex

BSA (m²) — if known

Height (cm)

Weight (kg)

BSA —

LV Mass (linear) —

Indexed LVM —

Severity (Linear ILVM) —

Relative Wall Thickness —

Understanding LV Geometry & Hypertrophy

LVH is defined by increased LV mass — not wall thickness alone. A dilated ventricle with normal wall thickness can still meet criteria for LVH if total muscle mass is elevated. Modern assessment uses LVMI to determine if hypertrophy is present, and RWT to classify the geometry pattern.

LVH Thresholds (Linear Method)

Sex	LVH Present (ILVM)
Men	> 115 g/m²
Women	> 95 g/m²

LV Mass Formula (ASE Linear / Devereux)

LVM (g) = 0.8 × {1.04 × [(IVSd + LVIDd + PWd)³ − LVIDd³]} + 0.6

Measurement sensitivity: Because all three linear measurements are cubed, even small errors are amplified. A 1–2 mm overestimation of IVS or PW can increase the calculated LV mass by 15–20%. Accurate, reproducible linear measurements are critical.

Relative Wall Thickness (RWT)

RWT = 2 × PW / LVEDD. This ratio describes the shape of the ventricle and is used alongside LVMI to classify LV geometry into one of four patterns.

The Four LV Geometry Patterns

LVMI	RWT	Geometry	Interpretation
Normal	≤ 0.42	Normal geometry	Healthy ventricle
Normal	> 0.42	Concentric remodelling	Early pressure adaptation — increased wall-to-cavity ratio without increased mass
Increased	> 0.42	Concentric LVH	Pressure overload — thick walls, normal or small cavity, increased mass
Increased	≤ 0.42	Eccentric LVH	Volume overload — dilated cavity with increased total mass

Concentric LVH — Pressure Overload

Characterised by thickened walls, a normal or small cavity, increased RWT (> 0.42), and elevated LVMI. The ventricle thickens to generate higher pressure against increased afterload. Common causes include hypertension, aortic stenosis, and hypertrophic cardiomyopathy.

Eccentric LVH — Volume Overload

Characterised by a dilated LV cavity, normal or only mildly increased wall thickness, normal or low RWT (≤ 0.42), but elevated total mass. The ventricle enlarges to accommodate increased preload. Common causes include mitral regurgitation, aortic regurgitation, and dilated cardiomyopathy.

Important distinction: Not all dilated hearts have LVH. A dilated LV with increased mass is eccentric LVH. A dilated LV with normal or reduced mass (e.g. advanced dilated cardiomyopathy with wall thinning) does not meet criteria for LVH. LVMI is the defining measurement — RWT only classifies the pattern.

Concentric remodelling: This pattern (normal LVMI, RWT > 0.42) is not LVH — but it is not normal. It represents early pressure adaptation and is strongly associated with hypertension. It is independently associated with increased cardiovascular risk and is frequently under-reported.

Clinical significance: Different geometry patterns reflect different disease processes with different causes, treatments, and prognoses. Concentric patterns indicate a pressure problem; eccentric patterns indicate a volume problem. Of all four patterns, concentric LVH carries the highest cardiovascular risk.

Measurement Pitfalls

Most errors in LVH classification come from measurement technique, not formulas. Because the ASE linear method cubes all three measurements, small systematic errors produce large differences in calculated mass.

Error	Effect
Including trabeculations or RV insertion in IVS	Overestimates septal thickness → falsely increases LVM
Off-axis parasternal long-axis view	Oblique cut overestimates wall thickness and underestimates cavity
Measuring at end-systole instead of end-diastole	Thicker walls at systole → overestimates IVS and PW
Foreshortened LV cavity	Underestimates LVEDD → falsely increases RWT
M-mode cursor not perpendicular to LV	Oblique M-mode overestimates dimensions
Including pericardium in PW measurement	Overestimates PW → falsely increases LVM and RWT
Inconsistency between M-mode and 2D measurements	Different methods yield different values — use one method consistently

Best practice: Measure at the tips of the mitral valve leaflets in a true parasternal long-axis view, at end-diastole (onset of QRS), using either 2D-guided M-mode or direct 2D. Exclude trabeculations, chordae, and pericardium. Use the same method consistently for serial studies.

References

Lang RM, 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. J Am Soc Echocardiogr. 2015;28:1–39.
Asch FM, et al; WASE Investigators. Similarities and Differences in Left Ventricular Size and Function among Races and Nationalities: Results of the World Alliance Societies of Echocardiography Normal Values Study. J Am Soc Echocardiogr. 2019;32(11):1396–1406.

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