On August 17, 2014, Li Yigang’s team at Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, performed a case of left heart ear occlusion to help a 70-year-old patient with atrial fibrillation combined with cerebral infarction to effectively reduce the risk of another stroke. The 70-year-old patient had a history of chronic atrial fibrillation for 4 years, multiple cerebral infarcts, and left behind left-sided limb movement problems and slurred speech. Due to the difficulty in walking and the need for family members to accompany him, he often had to spend more time and energy than normal people and was often in fear of another cerebral infarction or hemorrhage, and was eager for a safe and effective anticoagulation treatment that did not require medication or blood tests. The left auricular occlusion has such features. This procedure involves opening a tiny opening in the patient’s thigh vein, then using a catheter to deliver a titanium blocker near the entrance to the left auricle and finding the right place to release it, ultimately plugging the entrance to the left auricle. In patients with atrial fibrillation, the atria beat irregularly and the left auricle basically loses its contractile function, causing the blood entering it to remain inside for a long time and easily form a thrombus. Once the thrombus inside the left heart ear is dislodged, it can flow out of the heart ear with the blood and enter the brain, and then brain infarction will occur; entering the coronary artery of the heart will cause heart attack. In this regard, the traditional treatment is to take anticoagulant drugs, but the drugs can cause adverse reactions and need to monitor the coagulation index and increase or decrease the dosage according to the coagulation index, which is very tedious and consumes a lot of time, energy and cost. This procedure can effectively isolate the heart cavity of the left heart ear and prevent the inflow of blood, thus preventing the formation of blood clots. This technique has been adopted as an advanced technology in Europe, the United States and Hong Kong, China, and is ideal for patients with atrial fibrillation requiring long-term anticoagulation, especially those with cerebral infarction. The development of this technology in Xinhua Hospital has brought a boon to such patients.