If your baby has a heart murmur on physical examination, further examination is recommended to clarify the specific cause of the murmur and to rule out congenital heart disease, viral myocarditis and other serious diseases. You can do a heart ultrasound to clarify whether the heart structure is abnormal, because many children with congenital heart disease have murmurs in their hearts during physical examinations, to achieve early detection and early treatment. The reason is that many congenital heart disease patients have surgery before the age of 6 is the best time, if the age is too old is likely to lose a better time for surgery, to achieve early detection, early treatment. If the heart structure is normal, a cardiac enzyme test is done to determine if the arrhythmia is due to inflammation of the heart muscle caused by a virus infection. If this condition is likely to affect the child’s heart muscle, it is important to achieve early detection and early treatment and not to delay the condition.