Congenital arterial duct

Arterial catheters were originally normal blood flow channels between the pulmonary artery and the aorta during the fetal period. Because the lungs are not breathing at this time, pulmonary artery blood from the right ventricle enters the descending aorta through the catheter, and blood from the left ventricle enters the ascending aorta. Therefore, the arterial catheter is necessary for the special circulation method during the embryonic period. After birth, the lungs swell and assume the function of gas exchange. Pulmonary circulation and systemic circulation perform their respective duties. Soon the catheter is closed because of disuse. If it does not close continuously, it will constitute a morbid state, which is called arterial duct patency. Surgery should be performed to interrupt blood flow. When the arterial duct is not closed and is present in cyanotic heart disease with reduced pulmonary blood flow, the duct is an important condition for its survival, which is another matter. Arterial duct patency is a more common congenital cardiovascular malformation, accounting for 12 to 15% of the total number of congenital heart diseases. Such as sex is about twice that of men. About 10% of cases coexist with other cardiovascular malformations.