Hereditary cardiomyopathies There are four different types of cardiomyopathy. Click on a box to learn more about each type and what certain genetic test results mean for you. Arrhythmogenic cardiomyopathy (ACM) Arrhythmogenic right ventricular cardiomyopathy (ARVC) Dilated cardiomyopathy (DCM) Hypertrophic cardiomyopathy (HCM)