What do patients need to pay attention to before doing RF ablation surgery? Dr. Huimin Chu: First of all, patients should maintain a good psychological state, radiofrequency ablation is a high-tech surgery, the requirements of the surgeon is very high, but for the patient is a very safe surgery, preoperative tension is not too much, the surgery is very small trauma, generally only a few millimeters to a centimeter or so of wound, so no stitches. Before the surgery, we will do a series of tests, such as a CT examination of the heart, which will simulate the structure of the left atrium, and then introduce this simulated structure into the 3D navigation system of the surgery to match the structure of the patient’s heart, so as to guide the specific operation. Further, the patient also needs an esophageal ultrasound examination, mainly to clarify whether there is a blood clot inside the atrium in order to reduce the risk of stroke during the surgery. This is because if there is a blood clot inside the atrium or the heart ear, the patient can have a stroke at any time and anywhere. In addition, patients with persistent atrial fibrillation generally require a period of preoperative oral anticoagulation to reduce the risk of stroke during surgery. Patients with combined heart failure must be treated before surgery to restore stable heart function and avoid acute heart failure during surgery. In addition, if the patient has a combination of other diseases such as hypertension, it is also important to get the blood pressure and other indicators under control before surgery. How long do I need to take anticoagulants before surgery? Dr. Huimin Chu: Generally speaking, at least three weeks.