A one-year-old baby’s heart does not close may have no obvious symptoms, or may have chest tightness, shortness of breath, dyspnea, decreased resistance and other conditions. A one-year-old baby’s heart does not close, belongs to the congenital heart disease, most of the oval hole is not closed, atrial septal defect, ventricular septal defect, the defect is small may not have obvious symptoms. When the defects are small, there may be no obvious symptoms. When the defects are large, there may be symptoms of poor resistance, easy to catch a cold and fever, in addition, there may also be tightness in the chest, shortness of breath, and in severe cases, there may be symptoms of respiratory distress. One year old babies whose hearts are not closed should consult a specialist in time to make a clear diagnosis and then follow the doctor’s instructions to carry out targeted treatment, so as to avoid delaying the time of treatment.