Can a baby's fever cause myocarditis?

Patient's question:

A one-year-old baby has a fever. Urine test shows high lymphocyte count, suggesting a viral infection. However, creatine kinase is elevated to 207, which is above the normal range. After fever reduction, everything returns to normal. Could there be myocarditis?

Doctor's answer:

Myocarditis refers to inflammatory lesions of the heart muscle caused by various factors, which may manifest as palpitations, fainting, dizziness, chest tightness, chest pain, or severe myocardial damage or heart failure. Generally, a fever can lead to a decrease in creatine kinase, which is often associated with viral infections. This is myocardial damage caused by viral infection. After the body temperature returns to normal, creatine kinase can return to normal, so it is not myocarditis.

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