Patent ductus arteriosus is a type of congenital heart disease. Generally, patients around the age of six months to one year may not necessarily have their ductus arteriosus close. If it does not close by around one year of age, it is considered a congenital heart disease, and it is recommended to seek early surgical treatment at a hospital. Surgery is needed if the condition exceeds approximately 4mm in size. If the patient currently shows no symptoms, it is possible to initially observe the condition. However, if symptoms persist, accompanied by palpitations, chest tightness, difficulty breathing, especially if respiratory infections recur, treatment is necessary.