Familial cardiomyopathies are inherited in the following ways:1 , hypertrophic cardiomyopathy is autosomal dominant.2 , dilated cardiomyopathy is mostly autosomal dominant, with incomplete dominant inheritance under the influence of modifier genes and environmental factors, a few patients have autosomal recessive and X-linked inheritance, and there are sodium channel gene mutations in families of patients with atrioventricular block.3 , arrhythmogenic right ventricular cardiomyopathy This is also an autosomal dominant disorder. Familial cardiomyopathies, also known as hereditary cardiomyopathies, are associated with a risk of sudden death regardless of the type of familial cardiomyopathy. After a clear family history, typical symptoms and objective examination, all treatment is directed at clinical manifestations and prevention of sudden death. In patients with heart failure, angiotensin-converting enzyme inhibitors can be used to reduce cardiac load, decrease mortality and improve prognosis, and to avoid emotional stress and sudden exertion to prevent sudden death of the patient due to deterioration.