The introduction of transcatheter radiofrequency ablation (RFCA) has revolutionized the treatment of tachyarrhythmias and has shown that it is a safe and effective method for the eradication of tachyarrhythmias. The principle of radiofrequency ablation: through the puncture vein, the electrode catheter is placed into the heart cavity for electrophysiological examination to clarify the mechanism of arrhythmia onset and the key site of maintaining tachycardia; then radiofrequency electric energy is introduced into the heart lesion through the electrode catheter, and the lesion (folded ring and ectopic excitation foci) is ablated through quantitative release of energy to achieve the purpose of treatment. Radiofrequency current frequency is very high, so there is no stimulating effect on muscle and nerve; the patient only has the feeling of warmth during the ablation discharge, and no pain. Compared with drug treatment, radiofrequency ablation is not a temporary prevention or termination of tachycardia, but a one-time cure, no longer need to use anti-arrhythmic drugs; compared with surgery, it does not need to open the chest, do not need general anesthesia, the patient almost painless, easy operation method. In short, it is a safe, effective and easy-to-use treatment method. The main indications for radiofrequency catheter ablation are: (1) pre-excitation syndrome combined with paroxysmal atrial fibrillation and rapid ventricular rate; (2) atrial folding tachycardia, atrioventricular node folding tachycardia, atrial tachycardia, typical atrial flutter and normal ventricular tachycardia with recurrent episodes; (3) atrial folding tachycardia, atrioventricular node folding tachycardia, atrial tachycardia, typical atrial flutter and normal ventricular tachycardia with tachycardia cardiomyopathy (4) atrial folding tachycardia, atrioventricular node folding tachycardia, atrial tachycardia, typical atrial flutter and normal ventricular tachycardia with hemodynamic disorders; (5) typical atrial flutter with frequent episodes and ventricular rate not easily controlled; (6) atypical atrial flutter with frequent episodes and ventricular rate not easily controlled; (7) inappropriate sinus tachycardia combined with tachycardia cardiomyopathy; (8) post-infarction ventricular tachycardia with frequent episodes or heavy symptoms and Poor effect of drugs to prevent attacks, etc. (9) Atrial fibrillation, etc.