Non-cyanotic type: mainly suffering from ventricular septal defect, atrial septal defect, arteriovenous catheterization, aortic constriction and other diseases. Babies with more severe symptoms may show shortness of breath, excessive sweating, irritability, feeding difficulties, delayed nutritional development, and poorer activity than children of the same age. Most of these babies will have cardiac insufficiency at an early stage, but because cardiac insufficiency is easily combined with pneumonia, and the symptoms are similar to pneumonia, it is easy to misdiagnose the disease. Cyanosis: The main characteristic is “cyanosis”, which is common in complex precordial diseases such as tetralogy of Fallot, double outlet of right ventricle and single ventricle. Cyanosis is mainly a generalized or lower body cyanosis of the skin and mucous membranes that occurs in a calm state, either at birth or gradually after several months of life. In addition, as the disease progresses, there may be a tendency to squatting and pestle-like fingers, and short periods of syncope during dehydration, fever, and crying. Some babies may also present with brain abscess manifestations such as headache and convulsions. For the unborn baby, pregnancy checkups are very important. This is because for experienced doctors, some of the congenital heart diseases can be detected and some eugenic advice can be given by examination in the middle or even early stages of pregnancy. Of course, with early treatment, many congenital heart diseases can be completely cured!