This is an interventional technique that uses an electrode catheter to release radiofrequency current at a site within the cardiac cavity to cause localized coagulative necrosis of the endocardium and subendocardial myocardium, thereby destroying the point of origin of certain tachyarrhythmias. The basic equipment is an X-ray machine, a radiofrequency current generator and an intracardiac electrophysiological examination instrument. Under local anesthesia, three to four electrode catheters are delivered through the femoral vein and subclavian vein into the coronary sinus, high right atrium and bundle of Hirschsprung, and right ventricle to stimulate the atria and ventricles to induce clinically consistent tachycardia and locate the origin of tachycardia, and then the electrode catheter for ablation is delivered to the localized origin and connected to the external radiofrequency generator. If the tachycardia is not induced and there is no clinical follow-up, the ablation is successful. The diseases currently treated with this technique include paroxysmal supraventricular tachycardia, atrial flutter and atrial fibrillation, ventricular tachycardia, and atrial tachycardia caused by the preexcitation syndrome and the dual atrioventricular node pathway. The cure rate for paroxysmal supraventricular tachycardia is over 90%, and the cure rate for ventricular tachycardia is about 50%. Radiofrequency ablation of atrial tachycardia, atrial flutter and atrial fibrillation is in the clinical trial stage. Catheter radiofrequency ablation Cardiac arrhythmia refers to the abnormal change of the normal rhythm of the heart, and the arrhythmia faster than the normal heart rate (60-100 beats/min) is called tachyarrhythmia, which is clinically characterized by palpitations, panic, chest tightness, weakness, dizziness, dizziness, etc. In serious cases, chest pain, dyspnea, cold sweat, loss of consciousness, convulsions and other manifestations. 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 ECG during the attack; pre-excitation syndrome, which can be clearly diagnosed on ECG in most cases, but should be ablated if it is accompanied by panic or atrial fibrillation; atrial flutter and atrial tachycardia, with panic as the main manifestation, with a clear diagnosis on 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. Currently, 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 for atrial fibrillation; ventricular premature contractions Those with frequent ventricular premature contractions that are not well controlled by medication. A very thin catheter is inserted into the blood vessel from the neck or the root of the thigh, and after reaching the location of the heart, radiofrequency current is released to eliminate the “lesion” at once.