Echo Reference — Chamber Quantification
Normal LV Dimensions, Wall Thickness & Mass Index
Adult echocardiographic reference values for LV internal diameter (LVIDd, LVIDs), septal and posterior wall thickness, and LV mass index — absolute and BSA-indexed, by sex — with dilatation and hypertrophy grading, LV geometry classification, and an interactive LVMI calculator.
Normal LV Dimensions at a Glance
LV internal diameter is measured in the parasternal long-axis view at the level of the mitral leaflet tips, perpendicular to the LV long axis, by 2D-guided M-mode or direct 2D linear measurement. LVIDd is taken at end-diastole (onset of QRS) and LVIDs at end-systole. The values below are adult reference ranges from the ASE/EACVI chamber quantification guideline.
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| Measurement | Men | Women |
|---|---|---|
| LVIDd (cm) | 4.2 – 5.8 | 3.8 – 5.2 |
| LVIDs (cm) | 2.5 – 4.0 | 2.2 – 3.5 |
| LVIDd index (cm/m²) | 2.2 – 3.0 | 2.3 – 3.1 |
| LVIDs index (cm/m²) | 1.3 – 2.1 | 1.3 – 2.1 |
| IVSd / PWd (cm) | 0.6 – 1.0 | 0.6 – 0.9 |
| LV mass index — linear (g/m²) | 49 – 115 | 43 – 95 |
| Relative wall thickness (RWT) | ≤ 0.42 | ≤ 0.42 |
LV Internal Dimensions — Grading of Dilatation
The categories below describe increasing LV enlargement. Values are indexed to body surface area, which is preferable at the extremes of body size.
Men
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| Parameter | Normal | Mildly Dilated | Moderately Dilated | Severely Dilated |
|---|---|---|---|---|
| LVIDd index (cm/m²) | 2.2 – 3.0 | 3.1 – 3.3 | 3.4 – 3.6 | > 3.6 |
| LVIDs index (cm/m²) | 1.3 – 2.1 | 2.2 – 2.3 | 2.4 – 2.5 | > 2.5 |
Women
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| Parameter | Normal | Mildly Dilated | Moderately Dilated | Severely Dilated |
|---|---|---|---|---|
| LVIDd index (cm/m²) | 2.3 – 3.1 | 3.2 – 3.4 | 3.5 – 3.7 | > 3.7 |
| LVIDs index (cm/m²) | 1.3 – 2.1 | 2.2 – 2.3 | 2.4 – 2.6 | > 2.6 |
LV Wall Thickness — Severity Grading
Interventricular septum (IVSd) and posterior wall (PWd) thickness are measured at end-diastole in the parasternal long-axis view. Wall thickness is not indexed to BSA.
Men
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| Parameter | Normal | Mildly Abnormal | Moderately Abnormal | Severely Abnormal |
|---|---|---|---|---|
| IVSd (cm) | 0.6 – 1.0 | 1.1 – 1.3 | 1.4 – 1.6 | > 1.6 |
| PWd (cm) | 0.6 – 1.0 | 1.1 – 1.3 | 1.4 – 1.6 | > 1.6 |
Women
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| Parameter | Normal | Mildly Abnormal | Moderately Abnormal | Severely Abnormal |
|---|---|---|---|---|
| IVSd (cm) | 0.6 – 0.9 | 1.0 – 1.2 | 1.3 – 1.5 | > 1.5 |
| PWd (cm) | 0.6 – 0.9 | 1.0 – 1.2 | 1.3 – 1.5 | > 1.5 |
LV Mass Index (LVMI) — Severity Grading
LV mass may be calculated by the linear method (ASE cube formula) or by 2D methods (area–length or truncated ellipsoid). Both are indexed to BSA, but the reference ranges differ and the two methods are not interchangeable — use one method consistently for serial studies.
Men
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| Method | Normal | Mildly Abnormal | Moderately Abnormal | Severely Abnormal |
|---|---|---|---|---|
| LVMI — linear (g/m²) | 49 – 115 | 116 – 131 | 132 – 148 | > 148 |
| LVMI — 2D (g/m²) | 50 – 102 | 103 – 116 | 117 – 130 | > 130 |
Women
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| Method | Normal | Mildly Abnormal | Moderately Abnormal | Severely Abnormal |
|---|---|---|---|---|
| LVMI — linear (g/m²) | 43 – 95 | 96 – 108 | 109 – 121 | > 121 |
| LVMI — 2D (g/m²) | 44 – 88 | 89 – 100 | 101 – 112 | > 112 |
LV Mass Formula (ASE Linear / Devereux)
LV Mass
0.8 × {1.04 × [(IVSd + LVIDd + PWd)³ − LVIDd³]} + 0.6
grams; all dimensions in cm, at end-diastole
LV Mass Index
LV mass ÷ BSA
g/m²; BSA by Mosteller = √(height × weight / 3600)
Relative Wall Thickness
(2 × PWd) ÷ LVIDd
concentric pattern if > 0.42
LV Mass Index & Geometry Calculator
Enter IVSd, LVIDd and PWd (all at end-diastole, in cm), sex, and either BSA directly or height and weight. Returns LV mass by the ASE linear method, LVMI with severity grading, LVIDd index with dilatation grading, relative wall thickness, and LV geometry classification.
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Understanding LV Geometry & Hypertrophy
LVH is defined by increased LV mass — not wall thickness alone. A dilated ventricle with normal wall thickness may still meet criteria for LVH if total muscle mass is elevated. LVMI determines whether hypertrophy is present; relative wall thickness (RWT = 2 × PWd / LVIDd) classifies the geometric pattern.
| Sex | LVH present (LVMI, linear method) |
|---|---|
| Men | > 115 g/m² |
| Women | > 95 g/m² |
The Four LV Geometry Patterns
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| Geometry | LVMI | RWT | Interpretation |
|---|---|---|---|
| Normal geometry | Normal | ≤ 0.42 | Normal LV mass and relative wall thickness. Does not exclude systolic dysfunction, regional wall motion abnormality, fibrosis or valve disease. |
| Concentric remodelling | Normal | > 0.42 | Increased wall-to-cavity ratio without increased mass. May reflect pressure adaptation; commonly associated with hypertension. |
| Concentric LVH | Increased | > 0.42 | Thickened walls with a normal or small cavity and increased mass. Often associated with pressure loading. |
| Eccentric LVH | Increased | ≤ 0.42 | Dilated cavity with increased total mass. Often associated with chronic volume loading. |
Concentric LVH
Thickened walls, a normal or small cavity, RWT > 0.42 and elevated LVMI. This pattern is often associated with pressure loading — most commonly systemic hypertension and aortic stenosis. Concentric hypertrophy may also be the phenotype of a primary myocardial disease rather than a loading condition: hypertrophic cardiomyopathy, cardiac amyloidosis, Fabry disease and other infiltrative or storage disorders can all increase wall thickness and mass in the absence of afterload excess, and should be considered when the degree or distribution of hypertrophy is disproportionate to the load.
Eccentric LVH
A dilated LV cavity with normal or only mildly increased wall thickness, RWT ≤ 0.42, and elevated total mass. This pattern is often associated with chronic volume loading — mitral regurgitation, aortic regurgitation, high-output states — and with dilated cardiomyopathy.
Measurement Pitfalls
Most errors in LVH classification arise from measurement technique, not from the formula. Because the linear method cubes the measurements, small systematic errors produce large differences in calculated mass.
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| Error | Effect |
|---|---|
| Including trabeculations or the RV insertion in IVSd | Overestimates septal thickness → falsely increases LV mass |
| Off-axis parasternal long-axis view | Oblique cut overestimates wall thickness and underestimates cavity size |
| Measuring at end-systole instead of end-diastole | Walls are thicker in systole → overestimates IVSd and PWd |
| Incorrect or overly apical measurement level | Underestimates LVIDd → falsely increases RWT |
| M-mode cursor not perpendicular to the LV long axis | Oblique M-mode overestimates dimensions |
| Including pericardium in the PWd measurement | Overestimates PWd → falsely increases LV mass and RWT |
| Mixing M-mode and 2D measurements across studies | The methods yield different values — use one consistently |
Frequently Asked Questions
What is a normal LVIDd?
In adults, the normal LV internal diameter at end-diastole is 4.2–5.8 cm in men and 3.8–5.2 cm in women. Indexed to BSA, the normal range is 2.2–3.0 cm/m² in men and 2.3–3.1 cm/m² in women.
What LV mass index defines LVH?
By the ASE linear (Devereux) method, LVH is present when LVMI exceeds 115 g/m² in men or 95 g/m² in women. The 2D method uses different partition values (> 102 g/m² in men, > 88 g/m² in women), so the method used must be stated.
How is relative wall thickness calculated?
RWT = 2 × PWd / LVIDd, using end-diastolic measurements. A value above 0.42 indicates a concentric pattern; 0.42 or below indicates an eccentric pattern or normal geometry. RWT classifies geometry but does not by itself define hypertrophy — LVMI does.
Should LV dimensions be indexed to body surface area?
Indexing improves interpretation at the extremes of body size and is required for LV mass. BSA indexing may underestimate abnormality in obesity, because BSA rises with adiposity; indexing to height2.7 has been proposed as an alternative in this setting.
When are LV volumes preferred over linear dimensions?
Whenever LV geometry is distorted — aneurysm, post-infarction remodelling, or marked regional asymmetry — a single linear diameter is unrepresentative. Biplane Simpson's volumes, or 3D volumes where available, are preferred for sizing and for serial follow-up. See LV Volumes, Ejection Fraction & GLS.
References
- Lang RM, Badano LP, Mor-Avi V, 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):1–39. doi:10.1016/j.echo.2014.10.003
- Asch FM, Banchs J, Price R, 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. doi:10.1016/j.echo.2019.08.012
- Devereux RB, Alonso DR, Lutas EM, et al. Echocardiographic assessment of left ventricular hypertrophy: comparison to necropsy findings. Am J Cardiol. 1986;57(6):450–458. PubMed