Our next type of cardiomyopathy would be “Hypertrophic cardiomyopathy”:
Hypertrophic cardiomyopathy (HCM) is a disease characterized by hypertrophy of the left ventricle in the absence of loading conditions and haemodynamic stress.
Typically, HCM is usually recognized by maximal LV wall thickness ≥15 mm in one or more LV myocardial segments, with wall thickness of 13 to 14 mm considered borderline.
Other typical findings: LVOT obstruction with gradient at rest or exercise (dynamic obstruction), and mitral valve systolic anterior motion, are common but not obligatory for the diagnosis of HCM.
There are several patterns of hypertrophy, such as asymmetrical septal hypertrophy with or without LVOT obstruction, mid-ventricular hypertrophy, apical hypertrophy, LV free wall hypertrophy, posterobasal left ventricular free wall hypertrophy, segmental hypertrophy with normal LV mass on MRI, and, rarely, concentric hypertrophy similar to that found in systemic hypertension.