There is no effect of cardiac ultrasound on newborns. If the child has difficulty breathing or is cyanotic, it is necessary to have a cardiac ultrasound to clarify whether the child has congenital heart disease. If the baby has congenital heart disease, it is important to take extra care of the baby, pay attention to warmth, avoid catching cold and prevent infection, which can effectively reduce acute attacks. Once it is clear that congenital heart disease, such children are prone to intrapulmonary infections, once the infection is easy to lead to acute heart failure, so it is necessary to strengthen the warmth to prevent colds. A clear diagnosis of precocious heart disease should be clearly typed in time, some precocious heart disease can be surgically treated, and active surgery helps the prognosis.