According to relevant data, congenital heart disease is today the number one cause of death in children under 5 years of age. The first trimester of pregnancy is a critical period for the development of the structures within the fetal heart to take shape. If for any reason the development of the structures within the heart is halted or disrupted during the development process or if the tissues that should degenerate after birth fail to degenerate, defects, abnormal connections between parts, dysplasia, atresia or abnormal channels can form within the heart, which is congenital heart disease. Due to the lack of effective prevention methods for congenital heart disease, coupled with the fact that half of the children with untreated congenital heart disease die by the age of one and 2/3 by the age of two. Therefore, early detection, diagnosis and treatment are key to reducing the natural mortality rate of the disease. Babies often engage in puzzling behaviors, such as incessant crying and inexplicable restlessness, and are difficult to “calm down. Experts say that these behaviors are a sign that something may be wrong with their hearts. Parents should be on the lookout for precardiac disease if they notice the following signs in their children: frequent colds, recurrent bronchitis, pneumonia. Difficulty feeding or the infant refuses to eat, chokes and coughs, often eating and stopping, shortness of breath, pallor and breath-holding. The skin is persistently cyanotic, most noticeable at the tip of the nose, lips of the mouth, fingers and toes, and nail beds. Children who can walk often crouch down voluntarily for a moment while walking or playing. Older children have thickened and darkened terminal segments of the fingers and toes. Children complain of easy fatigue, poor stamina, plain sweating, perioral bruising, and hemoptysis. Development is abnormal, manifesting as thinness, malnutrition, and growth retardation. The child presents with chest pain and syncope.