Dilated cardiomyopathy

Dilated cardiomyopathy is a common type of primary cardiomyopathy. It is characterized by significant enlargement of the left ventricle (most) or right ventricle, with varying degrees of myocardial hypertrophy, and reduced ventricular systolic function. It is characterized by cardiac enlargement, heart failure, arrhythmia, and embolism. It was previously called congestive cardiomyopathy. The disease is often accompanied by arrhythmias, the condition is progressively exacerbated, and death can occur at any stage of the disease. About 20% of DCM patients have a family history of cardiomyopathy. In recent years, the diagnosis rate of dilated cardiomyopathy has gradually increased. It is estimated that the annual diagnosis rate is about 8 / 100,000 and the prevalence rate is about 37 / 100,000. Among them, half of the patients are under 55 years old, and about 1/3 of them Cardiac function was grade Ⅲ ～ Ⅳ (New York Heart Association grading standard). But some undiagnosed light patients may make the actual prevalence higher.