ABSTRACT
Drug and radiofrequency ablation were used to treat atrial fibrillation ( AF) . Because the drug therapy is often empiri?cal, and the side effects of drug can leads to many adverse reactions of heart and heart outside. Patient?s compliance is poor after long term medication, so the therapeutics effect is limited. At present, catheter ablation is the main therapy for the treatment of AF, and 2014 AHA/ACC/HRS guidelines has been recommended for the treatment of AF in the first line. But there is a certain recurrence af?ter ablation. There are many factors that cause the recurrence of AF, such as left atrial size, heart rate, PR interval, inflammatory factors. Accurate prediction of recurrence of AF after catheter ablation is helpful for early identification of high?risk groups, so as to take relevant preventive measures.