Patent ductus arteriosus generally refers to a condition in infants where the tubular passage between the aorta and pulmonary artery fails to fully close within the first year after birth. This results in altered blood flow within the heart, leading to the occurrence of patent ductus arteriosus. This blood flow disorder can increase the burden on the heart, causing recurrent episodes of breathlessness and breathing difficulties, and in severe cases, can lead to serious heart failure. If left untreated until the late stages, right-to-left shunting may occur, causing a serious mixing of arterial and venous blood. This leads to venous blood being ejected directly outside the body, causing a bluish-purple discoloration in the patient. Such conditions indicate a particularly severe heart disease. However, the majority of cases of patent ductus arteriosus can be addressed through minimally invasive interventional treatments. It is a simple congenital heart disease that should be treated promptly.