Radiofrequency ablation of secondary atrial fibrillation (AF) is used to block the effects of electrical activity from other parts of the heart. Secondary atrial fibrillation (AF) refers to the recurrence of AF after the first surgery or medication. The cause of AF is mainly due to the spread of electrical activity from other parts of the surrounding area to the atria, which causes confusion in the electrical activity of the heart itself, leading to atrial fibrillation. The main treatment for atrial fibrillation is radiofrequency ablation, which works by using high radiofrequency energy to kill a portion of the tissue, forming an isolation zone that cuts off other electrical activity to the atria to eliminate atrial fibrillation. Therefore, if you have atrial fibrillation, you need to contact your doctor as soon as possible for treatment, and according to the doctor’s guidance to carry out surgery or the use of drugs after surgery and the correct use of drugs, usually can achieve good results, without affecting daily life.