Normal thickness of the left ventricular myocardium is from 0.6 to 1.1 cm (as measured at the very end of diastole). If the myocardium is more than 1.1 cm thick, the diagnosis of LVH can be made.
The left ventricular free wall is thickest at the base and it
gradually thins towards the apex. At the tip of the apex
myocardium is 1–2 mm thick,
The interventricular septum increased from a median of 8.3 mm in the age group 20-29 to 11.2 mm in the group 60-70, whereas the posterior left ventricular wall increased from 7.5 mm to 9.8 mm.
, M et al Distinguishing ventricular septal bulge versus hypertrophic cardiomyopathy in the elderly Heart. 2016 Jul 15; 102(14): 1087–1094.
See Map of Left Ventricle