Cardiomyopathy cardiomyopathy is a disease of the heart muscle of unknown cause and is generally thought to be associated with viral infections, autoimmune reactions, genetics, drug toxicity and metabolic abnormalities. It does not include atopic cardiomyopathies of definite etiology or secondary to systemic diseases. Cardiomyopathies can be divided into three types: dilated cardiomyopathy, hypertrophic cardiomyopathy and restrictive cardiomyopathy. Among them, dilated cardiomyopathy and hypertrophic cardiomyopathy are more common. The cause of cardiomyopathy is still unknown. 1, dilated cardiomyopathy dilated cardiomyopathy may be related to certain factors viral, bacterial drug poisoning metabolic abnormalities caused by myocardial injury, of which viral myocarditis is believed to be the most important cause. 2, hypertrophic cardiomyopathy may be related to autosomal dominant genetic inheritance, about 1/3 of them have obvious family history, abnormal catecholamine metabolism, hypertension, high intensity exercise as its secondment factors. Restrictive cardiomyopathy is characterized by endomyocardial fibrosis, myocardial stiffness and obstruction of ventricular diastolic filling. It starts slowly, with symptoms such as fever, fatigue, dizziness and shortness of breath in the early stage, and total heart failure in the late stage. Atrial fibrillation is also more common, with some combined with visceral embolism.