Myocardial damage in children is mainly due to a significant increase in myocardial enzyme profile. This is because many factors can cause myocardial damage, such as viral myocarditis in children after an infection, especially a virus, which can invade the myocardium of children. When viral myocarditis occurs, the symptoms are mild, and the child’s symptoms are not obvious, such as weakness and panic. Myocardial enzyme testing in children will reveal abnormal elevations in the myocardial enzyme profile, especially in CKMB or troponin. If the myocardial damage in children is particularly severe, it can lead to syncope and shock, or even death. For children with myocardial damage, it is important to provide timely myocardial nutrition therapy.