Cardiac catheter radiofrequency ablation is a method of treating arrhythmias by introducing radiofrequency current (a high-frequency electromagnetic wave) into the heart through a cardiac catheter to ablate localized myocardial cells in specific areas in order to melt off the foldback loop or eliminate abnormal lesions. It is a method that can be used to achieve a radical cure for arrhythmias. Transcatheter radiofrequency ablation for the radical treatment of rapid arrhythmias was born in the mid-1980s of the 20th century, and this technology was introduced in China in the early 1990s. Thousands of patients who suffered from tachycardia are completely free from the disease and resume normal life, study and work. It can be said that radiofrequency ablation is by far the most rapidly developing and widely accepted new technology for both doctors and patients. The main indications are paroxysmal episodes of supraventricular tachycardia caused by atrioventricular bypass and atrioventricular node double pathway. For common paroxysmal supraventricular tachycardia, the success rate of radiofrequency ablation treatment can reach more than 95%, and the recurrence rate after surgery is 1-3%. In recent years, large cardiac interventional centers in China have achieved satisfactory results and experience with radiofrequency ablation for idiopathic ventricular tachycardia, frequent premature ventricular beats, atrial flutter, atrial tachycardia, and atrial fibrillation. How is radiofrequency ablation of cardiac catheters performed? First, the cardiac catheter electrodes are fed through the internal jugular vein or subclavian vein and bilateral femoral veins for electrophysiological examination to clarify the diagnosis and the location of the lesion to be ablated. Then, a specially designed large-headed ablation catheter is used to reach the site of the lesion, and radiofrequency current is delivered within a short period of time. The current power is usually 20-30 watts, and the radiofrequency current generates local relative high temperature after contacting the myocardial tissue, thus causing local myocardial tissue to dry and necrotic, and the necrotic myocardial tissue no longer plays the role of conducting electrical signals, thus the arrhythmia is cured. The local damage caused by the radiofrequency current to the myocardium is very limited, about 3-4 mm in diameter and depth, and does not affect the function of the heart. The procedure is completed after successful ablation is confirmed by intracardiac electrophysiological examination. The procedure is performed under local anesthesia and the patient is awake throughout the procedure and can tell the surgeon how he or she feels at any time. After the procedure is completed, most patients are able to move around the next day and are usually discharged in two to three days.