Cardiac arrhythmia, which is an abnormal change in the normal rhythm of the heart, and faster than the normal heart rate (60-100 beats/min) is called tachyarrhythmia. Clinically, palpitations, panic, chest tightness, weakness, dizziness and dizziness are the main manifestations, and in severe cases, chest pain, dyspnea, cold and sweaty limbs, loss of consciousness and convulsions may occur. Currently, transcatheter radiofrequency ablation is one of the treatment methods for this disease. The procedure is performed by inserting an electrode catheter into the heart through a punctured vessel under the monitoring of an X-ray angiography machine, first examining to determine the location of the abnormal structure causing tachycardia, and then releasing a high-frequency current locally at that location to produce a very high temperature in a very small area, which, through thermal efficacy, causes the evaporation of water in the local tissue and dries up the necrosis for treatment purposes. Because the local damage caused by RF current to the myocardium is very limited, about 3-4 mm in diameter and depth, and will not affect the surrounding normal myocardial tissue, so patients generally have no significant discomfort during the operation. The procedure is mostly completed in about one hour, and patients are usually discharged in two to three days. In general, the following arrhythmias can be treated with radiofrequency ablation: paroxysmal supraventricular tachycardia, sudden onset of panic, lasting from a few minutes to a few hours each time, with a clear diagnosis on the ECG during the attack; pre-excitation syndrome, which can be clearly diagnosed on the ECG in most cases, but should be ablated if accompanied by panic or atrial fibrillation; atrial flutter and atrial tachycardia, with panic as the main manifestation, with a clear diagnosis on the ECG during the attack; atrial flutter and atrial tachycardia, with a clear diagnosis on the ECG during the attack. Idiopathic ventricular tachycardia without other organic heart disease, often accompanied by dizziness and sometimes syncope during panic; atrial fibrillation including paroxysmal and persistent, repeated panic, easy to produce blood clots and increase the incidence of stroke. The current 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 for atrial fibrillation; premature ventricular contractions Those with markedly frequent ventricular premature contractions that are not well controlled by medication.