Cardiac ablation should be referred to as cardiac radiofrequency ablation, the main hazards and disadvantages of which are puncture injury, myocardial injury, and cardiac conduction system injury. 1. Puncture injury: cardiac radiofrequency ablation generally requires vascular puncture to insert the guidewire, and the blood vessels for puncture are usually the subclavian vein, internal jugular vein, femoral artery or femoral vein. The puncture operation is invasive, which may cause injury and hematoma at the puncture site. When puncturing the subclavian vein and the internal jugular vein, the tip of the lung may be injured by mistake, resulting in pneumothorax. 2. Myocardial injury: in the process of lesion ablation, the myocardium around the lesion may be injured by mistake, which may affect the contraction function of the heart in mild cases, or lead to perforation of the heart and pericardial tamponade in serious cases. 3. Damage to cardiac conduction system: Also during the ablation process, the cardiac conduction system may be injured, resulting in bradyarrhythmia, such as second or third degree atrioventricular block. In mild cases, it may return to normal after the edema period, while in severe cases, pacemaker therapy may be required. If you have any symptoms of discomfort, you should go to the hospital and consult your physician for guidance.