Radiofrequency ablation is mainly used to treat tachyarrhythmias, which are categorized into several types. If the patient has supraventricular tachycardia, the success rate of radiofrequency ablation can be more than 95%. If the patient has typical atrial flutter, the ablation success rate is similar to that of supraventricular tachycardia. For both of these conditions, radiofrequency ablation can be curative. For paroxysmal atrial fibrillation, the success rate of radiofrequency ablation is about 85%, while for persistent atrial fibrillation, the success rate varies from 60% to 80% because heart centers take a different approach to the procedure for persistent atrial fibrillation. For other tachyarrhythmias, such as atrial tachycardia, frequent atrial premature, frequent ventricular premature, and ventricular tachycardia, the success rate correlates with whether or not the patient is comorbid with underlying heart disease. If it is idiopathic ventricular tachycardia or ventricular tachycardia, the success rate is very high, but there is no uniform statistical data to show that the success rate of ablation is lower if the underlying cardiac disease of the arrhythmia is heart attack or cardiomyopathy. In recent years, with the continuous improvement of ablation technology and ablation equipment, the success rate of radiofrequency ablation for tachyarrhythmias has been increasing and good results can be achieved.