Damage to the baby’s heart muscle with fever is commonly caused by the invasion of viruses in the body, these viruses in the baby’s respiratory mucosa inflammatory reaction, sometimes can be involved in the heart muscle, causing damage to the cardiomyocytes, and even lead to heart failure. Be sure to hospitalize the baby, bed rest, ensure indoor quiet, to calm the baby’s emotions. In addition, cooperate with the doctor to actively anti-viral treatment, as well as nutrition of the heart muscle, to protect the damaged heart muscle cells. Observe the baby’s condition at any time to improve the baby’s heart function and prevent the occurrence of heart failure. After discharge from the hospital, there should also be regular follow-up visits for re-examination.