The first radiofrequency ablation procedure carries certain risks, such as perforation of the heart or slowing of the heart rate. 1. The biggest risk of cardiac radiofrequency ablation is the possibility of cardiac perforation during the procedure. Once perforation occurs, it may cause pericardial compression, at which time the patient will cause accelerated heart rate and decreased blood pressure, which may lead to cardiogenic shock in severe cases. Resuscitation should be carried out in a timely manner, and pericardiocentesis is needed to drain the pericardium to relieve the compression, and at the same time, a large amount of fluid rehydration is needed to maintain the blood pressure. 2. Secondly, radiofrequency ablation may cause heart rate slowing and atrioventricular block, especially third-degree atrioventricular block, which may require implantation of a permanent pacemaker. The main indications for radiofrequency ablation of the heart include tachyarrhythmias, especially junctional tachycardia, and paroxysmal atrial fibrillation, as well as frequent ventricular premature beats. If symptoms occur, treatment should be carried out under the supervision of a specialist.