Radiofrequency ablation is a method of treating arrhythmias by introducing radiofrequency current (a high-frequency electromagnetic wave) through a cardiac catheter into the heart to ablate localized myocardial cells in specific areas in order to melt off the foldback loop or eliminate the lesion. It is a method that can be used to achieve a radical cure. A cardiac catheter electrode is first implanted through the subclavian or internal jugular vein and femoral vein for electrophysiological examination to clarify the diagnosis and the location of the lesion to be ablated. Then a suitable ablation catheter reaches the site of the lesion and delivers radiofrequency current for ablation for 60 to 120 seconds, and the procedure is completed when successful ablation is confirmed by electrophysiological methods.