The cause of arrhythmia in children with heart disease should be clarified first, and according to the cause and condition of the disease, medication, radiofrequency ablation, surgery and other ways of treatment can be chosen according to the doctor’s instructions. 1. Drug therapy: you can choose amiodarone, propafenone and other anti-arrhythmic drugs, due to the immaturity of the child’s organs, the choice of drugs need to pay particular attention. 2. Radiofrequency ablation: For children with recurrent paroxysmal supraventricular tachycardia, pre-excitation syndrome, atrial fibrillation and other arrhythmias that are not treated with antiarrhythmic drugs, radiofrequency ablation can be used. 3. Surgery: If the arrhythmia is caused by primary heart disease such as congenital mitral stenosis, the primary disease can be treated by surgery. If the arrhythmia occurs in children with heart disease, they should seek medical treatment in time, and the relevant drugs should be used under the guidance of the doctor.