From a medical perspective, common cardiomyopathies are mainly divided into the following four categories: First, dilated cardiomyopathy, which refers to a type of cardiomyopathy characterized by significant enlargement of the heart, thinning of the ventricular walls, and declined heart function. Second, hypertrophic cardiomyopathy, which refers to a type of cardiomyopathy primarily characterized by thickening of the ventricular walls. Third, arrhythmogenic right ventricular dysplasia, a type of cardiomyopathy that is often clinically associated with episodes of ventricular arrhythmias. Fourth, restrictive cardiomyopathy, which is generally considered rare in clinical practice.