If a child develops myocardial ischemia. The first step is to rule out whether it is due to viral myocarditis. If it is caused by viral myocarditis, it is combined with myocardial nutrition and antiviral therapy. If viral myocarditis occurs along with symptoms of heart failure, the patient should be treated with a combination of diuretic and vasodilator therapy. Diuretics can be preferred to furosemide, and for those who are not sensitive to furosemide, torasemide can be chosen. If the patient’s myocardial ischemia is caused by anemia, ionic disorders, and abnormal thyroid function, it is combined with correction of anemia, ionic disorders, and improvement of thyroid function. For myocardial ischemia caused by congenital heart disease, it depends on the specific condition whether interventional surgery is needed. In addition, if it is caused by cardiomyopathy, it is necessary to avoid strenuous exercise and take drugs that slow down the heart rate, such as beta-blockers, depending on the actual condition and the type of cardiomyopathy.