Recently, the Department of Cardiology of Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, under the leadership of Professor Li Yigang, the head of the department, successfully performed three cases of percutaneous left auricular occlusion in three hours. All three patients were patients with atrial fibrillation and underwent percutaneous left auricular occlusion because they were unable to take oral anticoagulants for a long time. Our hospital introduced minimally invasive technology to introduce a 2-3 cm diameter blocker to block the left heart ear, which is prone to thrombosis and obstruction of blood vessels, to avoid the risk of stroke in patients with atrial fibrillation. The surgery was completed in about an hour in all three cases, and all patients did not require long-term oral anticoagulation after surgery. This procedure is currently available in only a few hospitals in China. According to Prof. Li Yigang, atrial fibrillation is the most common geriatric arrhythmia, with an incidence of 0.5%-1.5% in the general population. There are about 8 million patients with atrial fibrillation in China. The risk of stroke is five times higher in patients with atrial fibrillation than in the general population. Oral anticoagulant drugs are effective in preventing ischemic annoying stroke in patients with atrial fibrillation, but nearly 70% of patients in China are not taking anticoagulant drugs. Because the pharmacological effects of anticoagulants are affected by many factors, frequent blood sampling and monitoring is required, and about 21%-28% of patients will stop taking them because of bleeding, especially in older patients with a history of bleeding, liver and kidney insufficiency, the risk of bleeding is higher, and some patients are allergic to anticoagulants. Professor Li said, the left heart ear is located in the left atrium, the blood flow is slow, atrial fibrillation patients in the left ear easily stagnate blood to form a thrombus, once the thrombus is dislodged, with the blood flow to the brain, that will block the cerebral vessels cause stroke. Research data shows that more than 87% of strokes are due to thromboembolism; and in patients with non-valvular atrial fibrillation, more than 90% of thrombus formation originates from the left heart ear. Therefore, the use of minimally invasive techniques to place the left auricular occluder so that the thrombus cannot be dislodged is a better way to prevent stroke in patients with atrial fibrillation, especially in patients for whom anticoagulation is contraindicated. Percutaneous left auricular occlusion has been available for more than 10 years, and its safety and efficacy have been confirmed by the results of several clinical trials abroad. Because of the minimally invasive technique, the patient can get up and move around the next day after the operation, and the operation time is short and safe for the elderly, which is a new technology with good clinical application prospects.