With the aging process of our population and the increase of life expectancy per capita, the proportion of tooth extraction for patients with cardiovascular and cerebrovascular diseases is gradually increasing. Patients with cardiovascular and cerebrovascular diseases have a certain risk of tooth extraction, mainly due to the mental tension of the extraction process, the influence of surgical stimulation and pain, resulting in complications such as heart rate fluctuation, blood pressure rise, irregular heart rate, myocardial ischemia, etc. Serious cases can cause cerebral infarction and cerebral hemorrhage, angina pectoris, myocardial infarction, heart failure, etc. Therefore, the extraction of teeth for such patients must be done with caution: patients with any of the following conditions must be operated under cardiac supervision if extraction is needed 1. Patients with hypertension: stable hypertension for more than 1 month, good rest and sleep, no physical fatigue, blood pressure controlled below 180/95 mmHg after taking oral antihypertensive drugs; 2. Patients with heart failure of various causes, with cardiac function below class II; 3. Patients with the following types of arrhythmias: cardiac function below class III, occasional atrial premature beats and/or ventricular premature beats, atrioventricular block of degree I or II, and Complete or incomplete right bundle branch conduction block; left anterior branch left posterior branch conduction block, sinus bradycardia with ventricular rate above 50 beats/min, chronic atrial fibrillation with ventricular rate below 100 beats/min, etc.; 4, slow coronary artery supply deficiency, with appropriate treatment, etc., coronary artery disease after intervention or bypass surgery, taking anti-platelet drugs, with normal blood coagulation four; 5, acute myocardial infarction after 6 months of disease control 6. More than 6 months after control of cerebral hemorrhage; 7. Chronic obstructive pulmonary disease with stable condition; 8. Chronic liver disease with normal or near normal function and coagulation index; 9. Chronic kidney disease, uremic patients (with or without dialysis, kidney transplant) with normal or near normal renal function and anti-K+, Na+, Cl-, Ca+ index; 10. Diabetic patients with controlled blood sugar of 8.8 mmol/L or postprandial blood glucose below 11.0 mmol/L; 11. Patients with various hematological diseases, with normal or near normal blood routine and blood coagulation four items.