Arteriovenous ductus arteriosus is one of the common types of congenital heart disease in children, accounting for about 15% of all congenital heart disease cases. Passive opening of the ductus arteriosus during fetal life is an important channel of blood circulation, and ductus arteriosus is commonly seen in preterm infants, with an incidence of up to 80% in infants born before 28 weeks of gestation, with functional closure occurring approximately 24 hours after birth and anatomically complete closure one year after birth. If it remains open and produces pathophysiologic changes, it is referred to as an unclosed ductus arteriosus. What are the manifestations of an arterial ductus insufficiency? It is related to the fractional flow rate and the level of pulmonary artery pressure. If the fractional flow is high, there is fatigue, shortness of breath and sweating, thinness and pallor, hoarseness, and recurrent pneumonia and heart failure. In those with significant pulmonary hypertension, blood flow is shunted from the pulmonary artery to the aorta, and differential cyanosis occurs. The precordial region is elevated, with strong apical pulsations and enlargement of the turbinate border to the lower left. There is a continuous machine-like murmur between the 2nd and 3rd ribs at the left sternal border, a diastolic murmur in the apical region, and a hyperactive second pulmonary artery sound. There is a loud continuous murmur on the lateral side, which may be transmitted to the left upper cervical dorsum, with systolic or continuous fine tremor. After the development of pulmonary hypertension, only a systolic murmur may be heard. Peripheral vascular signs may be present: femoral artery gunshot sound, watery pulse, and capillary pulsation sign. What is the diagnosis of ductus arteriosus? The diagnosis can be made by combining the child’s symptoms with an electrocardiogram, cardiac ultrasound, and chest X-ray. What is the treatment method of arteriovenous ductus arteriosus? 1.It is possible to close naturally within 3 months, if there are no obvious symptoms, regular follow-up can be performed 2.Premature infants can try anti-inflammatory pain to promote its closure 3.Serious symptoms should be treated by surgery as soon as possible 4.If neonatal PDA has a large shunt flow, repeated pneumonia and heart failure, and medical treatment is ineffective, emergency PDA ligation can be considered in the neonatal period