Left Ventricular Mass (ASE)
Enter interventricular septal thickness (IVSd), LV internal dimension in diastole (LVIDd), and posterior wall thickness (PWTd) to compute LV mass. Optional height/weight calculate LV mass index.
How to Use This Calculator
Acquire echo measurements
Measure IVSd, LVIDd, and PWTd from parasternal long-axis view at end-diastole per ASE guidelines.
Input patient demographics
Sex influences diagnostic thresholds; optional height and weight allow mass index calculation (g/m²).
Interpret hypertrophy
Use LVMI to categorise hypertrophy and correlate with blood pressure control, valvular pathology, or cardiomyopathies.
Formula
LV mass (g) = 0.8 × [1.04 × ((IVSd + LVIDd + PWTd)³ − LVIDd³)] + 0.6
LV mass index (g/m²) = LV mass ÷ Body surface area.
BSA (Mosteller) = √((Height (cm) × Weight (kg)) ÷ 3600).
Full Description
Left ventricular mass reflects myocardial hypertrophy driven by chronic pressure overload, valvular disease, or cardiomyopathies. The ASE-corrected cube formula is validated for M-mode and two-dimensional measurements. Elevated LV mass index predicts cardiovascular morbidity and mortality, guiding therapeutic targets for hypertension, aortic stenosis, and heart failure management.
Frequently Asked Questions
Can I use eccentric hypertrophy measurements?
The cube formula assumes concentric geometry. For eccentric LV dilation, cardiac MRI provides more accurate volumetric mass.
What if measurements are in millimetres?
Convert to centimetres by dividing by 10 before entering values.
Does body surface area indexing apply to obesity?
BSA indexing may underestimate hypertrophy in severe obesity; consider height².⁷ indexing when clinically relevant.
Should I average multiple beats?
Yes. Average ≥3 beats (≥5 in atrial fibrillation) to minimise measurement variability.