Cardiovascular and cerebrovascular diseases are characterized by risk factors, rapid onset and high mortality. 1. Accompanying risk factors: patients with cardiovascular and cerebrovascular diseases are often accompanied by risk factors such as old age, smoking, alcoholism, high blood lipids, diabetes mellitus, obesity, hypertension and so on. 2. Rapid onset: Heart diseases such as coronary heart disease and myocardial infarction, and cerebrovascular diseases such as cerebral infarction and cerebral hemorrhage usually have a rapid onset and serious symptoms, requiring timely treatment. Therefore, patients with cardiovascular and cerebrovascular diseases account for the majority of patients admitted to the emergency room. 3. High mortality rate: after myocardial infarction, serious arrhythmia, shock or heart failure will occur and cause death of patients. Cerebral infarction and cerebral hemorrhage can directly cause brain tissue damage, and untimely treatment will cause death or disability. Therefore, usually need to actively prevent the occurrence of cardiovascular and cerebrovascular diseases, patients with risk factors should be actively improved and treated, patients with cardiovascular and cerebrovascular diseases should go to the hospital in a timely manner, early treatment.