Left Ventricular Mass Index (LVMI) Calculator

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Category Medicine & Tests

Patient Data

Gender

Height (cm)

Weight (kg)

Echo Dimensions (mm)

LVIDd (Internal Diameter)

IVSd (Septal Thickness)

PWTd (Post. Wall Thickness)

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About

Left Ventricular Hypertrophy (LVH) is a strong independent predictor of cardiovascular morbidity. Absolute heart mass varies with body size, making direct comparisons inaccurate. The Left Ventricular Mass Index (LVMI) normalizes the calculated mass to the Body Surface Area (BSA), providing a standardized metric for diagnosing hypertrophy.

This tool utilizes the Devereux formula, the standard for M-mode echocardiography measurements. It automates the BSA calculation (Du Bois method) to streamline the workflow. Accurate input of diastolic dimensions is critical, as errors are cubed in the mass formula.

Formulas

1. Body Surface Area (Du Bois):

BSA = 0.007184 × W^0.425 × H^0.725

2. LV Mass (Devereux):

LVM = 0.8 ⋅ [1.04 ⋅ ((LVID + IVS + PWT)³ − LVID³)] + 0.6

3. LV Mass Index:

LVMI = LVMBSA

Reference Data

Classification	Women (g/m²)	Men (g/m²)
Normal	≤ 95	≤ 115
Mild LVH	96 − 108	116 − 131
Moderate LVH	109 − 121	132 − 148
Severe LVH	≥ 122	≥ 149

Frequently Asked Questions

Scaling to height (e.g., height^2.7) is sometimes used for pediatric or very obese populations, but BSA normalization remains the most widely validated method for general adult cardiology.

The formula requires millimeters (mm) for LVID, IVS, and PWT. The tool converts the final mass to grams (g).

The Devereux formula was derived from M-mode echoes. While linear measurements derived from 2D images are often used, Area-Length methods are preferred for 2D mass calculations if the ventricle shape is distorted.