The left auricular block is done mainly for patients with atrial fibrillation who need anticoagulation but have anticoagulant counterindications and are not able to use anticoagulants. Is it true that after the left ear block is done, anticoagulants can be eliminated immediately? Is it true that if you had taken warfarin or Bactrim, you can stop taking them now? In fact, the actual situation is not exactly like this, in fact, the left ear block is a plug and a cap, which are different types of left ear block. Therefore, the postoperative anticoagulation requirements are also different for different types of left heart ear block. In the case of Watchman, the plug is inserted into the left heart ear, and the seal is very tight and well sealed. At this time, the endothelialization of the left heart ear is needed, that is, the endothelium covers all the devices of the seal before it is considered successful. For Watchman, it takes at least 45 days of anticoagulants to get the top to grow flat. In some hospitals, it takes more than just 45 days, it takes up to 3 months, and then at 3 months, the patient comes back for a follow-up esophageal ultrasound to see if it is growing well, and only when it is growing well do they feel comfortable to stop the anticoagulant. For the cap type is different again. For this cap type, if you take anticoagulants before surgery, you can stop taking them altogether on the day you do the surgery. If you don’t take it in front, you don’t have to take it after surgery. What to do? This patient is on aspirin after surgery, plus clopidogrel, for 3-6 months, also at the 3-month mark, to see if it grows back. If it grows well, you may choose aspirin or clopidogrel one, just keep taking it. So, the anticoagulation is very important. Postoperative anticoagulation and postoperative antiplatelet issues are very important. Some time ago, the French did a clinical study and found that the incidence of thrombosis associated with the implanted blocker was very high, about 8%, and even up to 25% in some devices. However, China has not found such a high rate yet, because it is now very standardized and the indications are very well chosen, so that such excellent results can be achieved.