First of all, the indications are now wider and the only absolute contraindication is left atrial thrombosis. As long as drug control is difficult to maintain sinus rhythm or amiodarone is the only drug to maintain sinus rhythm, catheter ablation can be considered. Secondly, the patient’s preoperative and postoperative tolerance to anticoagulation should be evaluated, and if there is a contraindication to warfarin anticoagulation, catheter ablation is also not indicated. Patients generally tolerate lying down for 3-6 hours, during which time they cannot move their body, which is especially important for ablation guided by 3D labeling systems such as CARTO or Ensite, otherwise the 3D image of the left atrium will differ significantly from the actual situation, leading to incorrect ablation pathways or prolonged procedure time. In addition, because catheterized ablation of AF nowadays tends to use cold saline-perfused catheters, during which the fluid entry is large, most patients have to be catheterized preoperatively.