Arrhythmia is an abnormal change in the normal rhythm of the heart. These include tachyarrhythmias such as supraventricular tachycardia, atrial tachycardia, and ventricular tachycardia, etc. The heart beats wildly at the onset, and the main clinical manifestations are panic, chest tightness, weakness, dizziness, etc. In severe cases, chest pain, dyspnea, cold and sweaty limbs, decreased blood pressure, loss of consciousness, and convulsions may occur. Currently, the ideal treatment for this disease is transcatheter radiofrequency ablation. The procedure is performed by puncturing a blood vessel and inserting an electrode catheter into the corresponding part of the heart under the monitoring of angiography machine and cardiac electricity, first examining to determine the mechanism causing tachycardia and the location of the abnormal structure, and then releasing radiofrequency current at that place to generate high temperature locally, which, through thermal effectiveness, causes dehydration, drying and necrosis to achieve the purpose of treatment (and most of them can be cured radically). Since the local damage caused by radiofrequency current to the myocardium is very limited and does not affect the surrounding normal myocardial tissue, patients generally have no significant discomfort during the operation. The procedure is performed under local anesthesia and is mostly completed in about 1 hour, and the patient is discharged after 2 days of observation. The following arrhythmias can be treated by transcatheter radiofrequency ablation: 1. paroxysmal supraventricular tachycardia (including atrioventricular node double transcatheter, occult atrioventricular bypass) sudden onset and cessation of panic, each lasting several minutes to several hours or even longer; 2. pre-excitation syndrome It is a dominant atrioventricular bypass, most of which can be clearly diagnosed by the usual general electrocardiogram, and supraventricular tachycardia or atrial fibrillation can occur, which should be treated by radiofrequency ablation; 3. Atrial tachycardia and atrial flutter, panic is the main manifestation; 4, idiopathic ventricular tachycardia, no organic heart disease in routine examination, sudden onset and stop of panic, may be accompanied by dizziness, sometimes sweating, blood pressure drop, syncope; 5, atrial fibrillation including paroxysmal and persistent, repeated panic, easy to produce blood clots and increase the incidence of stroke significantly. The success rate of radiofrequency ablation of atrial fibrillation is not as high as that of other types of tachycardia, but it is still an important treatment option; 6. premature ventricular contractions Frequent premature ventricular contractions with obvious symptoms that are not well controlled by medication; the above arrhythmias can be clearly diagnosed by doing an electrocardiogram at the time of attack, and in most cases the diagnosis can also be expected to be confirmed by doing esophageal atrial pacing (a non-invasive cardiac electrophysiological examination) during the non-attack period. Long-term antiarrhythmic drugs have significant side effects and limited efficacy. Compared with drug therapy, transcatheter radiofrequency ablation is not a temporary prevention or termination of tachycardia episodes, but a radical treatment; compared with surgical procedures, it does not require open-heart and general anesthesia, is minimally invasive and painless, and is easy to operate and technically mature. It can be said that transcatheter radiofrequency ablation can appease the patient’s wildly beating heart and is currently the best choice for the treatment of tachyarrhythmias.