Paroxysmal supraventricular tachycardia is a common arrhythmia in children, with heart rates as high as 180 to 300 beats per minute. Anti-arrhythmic drugs can temporarily suppress tachycardia episodes, but they are not a cure, and long-term use has certain toxic effects on children. In the last decade or so, radiofrequency catheter ablation has been used for the radical treatment of pediatric tachyarrhythmias such as paroxysmal supraventricular tachycardia, with excellent results. Because of its high success rate, low trauma and relative safety, it has become the method of choice for the eradication of these arrhythmias. 1.What is radiofrequency catheter ablation? Radiofrequency catheter ablation is performed by puncturing a blood vessel, sending a very fine measuring electrode through the blood vessel to a specific part of the heart, combining intracardiac pacing and programmed stimulation, determining the sequence and location of abnormal electrical conduction in the heart, applying the ablation electrode catheter to reach the corresponding location, and the microheat generated by the energy of radiofrequency current released from the tip of the specially designed catheter, producing controlled damage to the abnormal conduction pathway or excitation point locally, thus achieving the treatment The purpose is to achieve treatment. After the operation, the catheter is withdrawn, and there are only two to four 3mm-sized wounds at the root of the thigh and under the left clavicle, and you can go down to the ground the day after the operation. 2.What kind of pediatric tachycardia can be treated by radiofrequency ablation? What is the success rate? Radiofrequency ablation can be used to treat preexcitation syndrome (success rate >96%), atrioventricular node regurgitation tachycardia (success rate >97%), atrial tachycardia (success rate 60%-90%), atrial flutter (success rate 90%-95% for typical atrial flutter), idiopathic ventricular tachycardia and frequent ventricular preterm contractions (premature beats) (success rate 70%-90% depending on the location of the ectopic origin). 3. What is the appropriate age for choosing radiofrequency ablation surgery? The age at which the procedure should be performed varies depending on the type and location of the tachycardia. At the same time, the age of surgery is also closely related to the experience of the surgeon, and experienced pediatric surgeons may relax the age of surgery as appropriate. Usually, the age of surgery should be >3 years old, and preferably >5-7 years old for a dual atrioventricular node pathway. The right free wall dominant preexcitation can relax the age appropriately, and when the tachycardia continues to be life-threatening, even infantile surgery can be chosen. 4.Is there any danger in pediatric radiofrequency ablation surgery? Although the number of cardiac centers performing and treating pediatric radiofrequency surgery is much lower than that of adults, the success rate and complications are no different from those of adults. The risk of the procedure depends more on the location of the abnormal conduction pathway, and the surgeon may choose to forgo the procedure if necessary to avoid complications.