Disease analysis: There are many treatments for atrial fibrillation. At present, the most commonly used methods include drug therapy, electric defibrillation therapy, drug interventional therapy, surgical treatment and so on. According to the different condition of each patient, the doctor will choose different treatment methods. Drug therapy includes antiarrhythmic drugs and anticoagulant drugs. Drug therapy can only control symptoms and prevent complications, but can't treat atrial fibrillation. Generally, long-term medication is needed. Tremor therapy is suitable for patients with ineffective drug control. The success rate of single conversion is very high, but the recurrence rate can be as high as 60%. It is easy to cause tissue burns and systemic effects of patients. At present, interventional therapy is widely used, but due to technical limitations, the single success rate of persistent atrial fibrillation and permanent atrial fibrillation is not very high, and generally requires multiple treatments. The cost is relatively high. Moreover, interventional therapy can not remove the left atrial appendage (most patients with atrial fibrillation have thrombosis from the left atrial appendage after stroke), and they still need to take anticoagulant drugs for a long time after operation. Interventional therapy may cause serious complications, such as cardiac perforation, pericardial tamponade, cardioesophageal fistula and so on. The gold standard of surgical treatment is "maze operation" because it can remove the cause of atrial fibrillation. And the left atrial appendage can be removed, so the cure rate of atrial fibrillation is very high and the probability of postoperative stroke is very low. However, the earliest maze operation needs to cut the left atrium into many small parts, which leads to more postoperative complications. Now it has been replaced by "improved maze ⅲ operation", which uses bipolar radiofrequency ablation to replace the earliest cutting and suturing method, thus reducing postoperative complications without reducing the postoperative cure rate. But also avoid long-term medication after operation. Now, another method has been added to the surgical treatment-minimally invasive surgical treatment of atrial fibrillation. Minimally invasive treatment of atrial fibrillation refers to minimally invasive radiofrequency ablation (minimally invasive ablation), also known as Wolf mini-maze surgery, which was put forward and gradually developed by American doctor Randoll Wolf in 2002. The operation abandoned the median sternotomy of traditional heart surgery, and used a small intercostal incision and special surgical instruments to isolate bilateral pulmonary veins and cut or close the left atrial appendage, so as to finally achieve the purpose of treating atrial fibrillation. Now many hospitals in China have carried out it. Suggestion: