1.When you suspect that your child has precordial disease, it is best to see an experienced pediatrician or cardiovascular specialist first. 2, chest X-ray: can understand the location of the heart, size, lung blood, X-ray examination does not see abnormalities can not completely exclude the existence of precordial disease. 3.Electrocardiogram: It can understand the heart rhythm (rate) and the presence of atrial hypertrophy, myocardial hypertrophy and myocardial strain. 4.Heart ultrasound: Heart ultrasound can make a clear diagnosis for most cases. Based on the above 4 points, an experienced physician can often provide the right advice for your child’s diagnosis and treatment.