Any surgery carries certain risks, and cardiac radiofrequency ablation surgery also carries risks, but the exact risks vary from person to person. Radiofrequency ablation of the heart is a procedure used to treat arrhythmias by placing an electrode catheter through a vein or artery into a specific part of the heart and releasing an electric current to eliminate the lesion. However, there are some risks associated with the procedure because it is performed inside the heart chambers. Common complications of cardiac radiofrequency ablation are as follows: 1. Cardiac perforation: If the current is not well controlled or if the patient is not well evaluated due to contraindications, there is a possibility of cardiac perforation. This is the biggest risk. 2. Vascular hemorrhage: cardiac radiofrequency ablation requires puncture during the operation, and then put in the radiofrequency probe. During the surgical operation, there is a risk of injury bleeding. 3. Heart rate slowing: There is a risk of atrioventricular block during the procedure, which induces heart rate slowing. Therefore, although cardiac radiofrequency ablation is risky, the risk is relatively low and serious complications are rare. However, the risk of the procedure varies from person to person, and there are a small number of people who experience complications such as cardiac tamponade and atrioventricular block after the procedure. For this reason, it is important to carefully communicate with your doctor before the procedure and make good preparations before the procedure.