Ventricular hypertrophy (VH) is thickening of the walls of a ventricle (lower chamber) of the heart.[1][better source needed] Although left ventricular hypertrophy (LVH) is more common, right ventricular hypertrophy (RVH), as well as concurrent hypertrophy of both ventricles can also occur.

Reference
Wiki: Cardiomyocyte hypertrophy