Idiopathic cardiomyopathy refers to primary cardiomyopathy without a specific cause, mostly due to genetic factors. Common idiopathic cardiomyopathies, including dilated cardiomyopathy, hypertrophic cardiomyopathy, and restrictive cardiomyopathy, the most common idiopathic cardiomyopathy is dilated cardiomyopathy. The etiology of dilated cardiomyopathy is unclear. It is mainly characterized by diffuse reduction of ventricular wall motion, thinning of the ventricular wall, and enlargement of the internal diameter of the ventricles. The known possible causes include genetic factors, persistent viral infections, and other factors. Alcoholism, anticancer drugs, and various factors such as disorders of myocardial energy metabolism act to cause dilated cardiomyopathy. Dilated cardiomyopathy can have symptoms of heart failure such as shortness of breath, dyspnea, edema and hepatomegaly, and can even lead to sudden death, which is mostly due to arrhythmias. The treatment can be installed with a biventricular pacemaker to synchronize the stimulation of the left and right ventricles to make the ventricular contraction more coordinated, which is often referred to clinically as CRT, or cardiac resynchronization therapy, and heart transplantation can be considered for end-stage dilated cardiomyopathy.