Patient: Description (onset time, main symptoms, hospital visited, etc.): My child is 8 years old and had myocarditis three years ago. Is this a sign of myocarditis and how should I treat it? The normal value of creatine kinase in the laboratory is less than 200 U/L. I wonder what the normal value is at the hospital you are visiting. Patient: Thank you, Dr. An, for your answer. The maximum standard value at the hospital I visited was 190, and the child’s was 199, and the electrocardiogram was normal. An Jindou, Department of Pediatrics, First Affiliated Hospital of Zhengzhou University: jcj760524:Hello! The creatine kinase is slightly high, not good diagnosis for myocarditis, if the ECG, cardiac orthopantomogram and cardiac ultrasound are normal, and the child has no symptoms, you can continue to observe, no need to be nervous.