In obese patients, standard indexing by BSA may underestimate the severity of LVH because excess adipose tissue bloats the denominator. Consider indexing to height (m^2.7) or utilizing Body Fat Percentage distributions instead.
M-mode heavily relies on geometric assumptions (that the ventricle is a prolate ellipse). If shape is significantly distorted (e.g. basal septal bulge or asymmetric remodeling), 3D echocardiography or Cardiac Magnetic Resonance (CMR) offers significantly improved accuracy.
Age and gender independently impact normal ranges. While Japanese and American cohorts show no racial variations in 3DE studies, significant divergence still occurs strictly by biological sex.
Section 4
Evidence Appraisal
Primary References
Normal Values of Left Ventricular Mass Index Assessed by Transthoracic Three-Dimensional Echocardiography.
Mizukoshi K et al. • J Am Soc Echocardiogr.. 2016;Demonstrated superior accuracy of 3DE vs CMR for LV mass quantification, confirmed age/gender dependence, and ruled out ethnic variability between Japanese and American patient populations. https://doi.org/10.1016/j.echo.2015.09.009
The relationship between left ventricular mass index and body composition in new-diagnosed hypertensive patients.
Karakan S et al. • Clin Hypertens.. 2015;Proved independent association of Body Fat Percentage (BFP) and higher LVMI in normotensive to newly hypertensive patients. Strongly advocates correcting for adipose influence. https://doi.org/10.1186/s40885-015-0033-6
