1. What are the common types of pediatric arrhythmias? Premature beats, tachycardia, bradycardia, sinus arrest, conduction block, etc. 2. What are the main symptoms of pediatric arrhythmia? Chest tightness, panic, arrhythmia, etc. 3. How to treat pediatric arrhythmias? Different types of arrhythmias are treated differently. Occasional premature beats do not require special treatment, and most of them will disappear after anti-inflammatory and myocardial nutrition treatment. Frequent premature beats require oral antiarrhythmic drugs, with propafenone (cardioplegia) being the first choice and betalactone or amiodarone being used if they are ineffective. In cases of bradycardia or conduction block, adrenal corticosteroids (dexamethasone, methylprednisolone or prednisone) should be used. 4. What are the nursing measures for pediatric arrhythmia? During hospitalization, cardiac monitoring is usually required, pay attention to the child’s performance, report any abnormalities to the doctor on duty immediately, and after discharge or at home for lighter patients, pay attention to let the child rest well, do not get cold, do not contact with infected patients with colds and flu, prevent cross-infection, and prevent recurrence of the disease. 5. What are the causes of pediatric supraventricular tachycardia? What are the common symptoms? How to treat? Can it be treated with radiofrequency ablation? Paroxysmal supraventricular tachycardia is mostly caused by congenital abnormalities of the cardiac conduction system. Common symptoms include panic, chest tightness, irritability, crying, cold sweating, pallor, etc. The diagnosis can be confirmed by electrocardiogram. Mild episodes can recover on their own for a short time without medication; those who do not recover for more than half an hour need to be hospitalized as soon as possible and apply anti-arrhythmic drugs (propafenone or amiodarone) to restore the heart rhythm; frequent episodes need to be treated with radiofrequency ablation, preferably over 6 years old, which has a small risk and high success rate (more than 95%), but about 5% of patients can recur after surgery.