Fig

This is a cross section of the heart with marked concentric thickening of the Lt ventricular wall. Note the corresponding decrease in the ventricular cavity. The LV (Lt) is over 2 cm in thickness (N: 1-1.5 cm). The wt of the heart consequently increase to over the normal of 350 g. some times up to 800 g. Systemic hypertension is a common cause.
Concentric Hypertrophy of Lt V

Pressure hypertrophy due to left ventricular outflow obstruction. The left ventricle is to your right in this apical four-chamber view of the heart.
Left ventricular hypertrophy