Cardiovascular disease is one of the most common diseases that affect middle-aged and elderly people. With the development of life and medical technology, many people who look very healthy have more serious cardiovascular diseases. Tooth extraction is stimulating to the patient, and combined with the patient’s nervousness, fear and elevated blood pressure, it may cause cardiovascular accidents. Therefore, even in patients who appear to be in good health, it is important for the doctor to evaluate the patient thoroughly, especially the cardiovascular system. Which patients can be safely extracted? Patients with acute myocardial infarction who have been stable for more than six months after treatment and are asymptomatic with cardiac function class I to II and stable blood pressure below 180/100mmHg Stable angina II or less Atrioventricular block Which patients should be given high priority? 1, rheumatic heart valve disease (including those who have undergone valve replacement surgery). 2, chronic atrial fibrillation ventricular rate control of 70-90 beats / min. 3, blood pressure between 180/100-200/120mmHg. 4. A pacemaker is installed. Which patients should not be extracted? 1.Multi-source premature beats, ventricular premature succession. 2.Blood pressure of 200/120mmHg or more. 3. Unstable angina pectoris. 4. Class III-IV cardiac function. What is the preparation before extraction for patients with III AV block cardiovascular disease? 1. Take oral antimicrobial agents before and one week after surgery for hypertensive patients. 2. Anticoagulant patients should stop taking anticoagulants 24 hours before surgery under the guidance of a specialist. 3. Tooth extraction under cardiac monitoring can effectively improve the safety of tooth extraction in patients with cardiovascular diseases! The dynamic changes of ECG, blood pressure and blood oxygen can be closely observed during the operation, so that any problems can be detected and dealt with in time before the patient has symptoms. In our hospital, the extraction of teeth for patients with cardiovascular diseases under painless, minimally invasive and cardiac monitoring has greatly reduced the occurrence of cardiovascular accidents.