The following treatment measures can be used for children with arrhythmias: 1. Children should be given proper rest. If the arrhythmia is caused by myocarditis, especially in the case of acute myocarditis, the child must rest properly, preferably in bed for a period of time. 2. Nutritional myocardial therapy for children, such as the application of Ralegion oral solution, can improve the symptoms of myocarditis due to viral infection. 3. Anti-arrhythmic drugs can be applied to children. If the arrhythmia is mainly sinus tachycardia, the child can be given amiodarone to slow down the heart rate.