While the ductus arteriosus is open, infants may not have noticeable symptoms. In a child with interrupted aortic arch, the PDA gives another way to get enough blood flow to the lower body. If the ductus arteriosus stays open, it is called a patent ductus arteriosus (PDA). Shortly after birth, the ductus arteriosus usually closes. The ductus arteriosus is critical to survival in the womb. Normally, a fetus has an extra arterial connection called a ductus arteriosus. An infant with interrupted aortic arch must depend on an another way to get blood flow to the lower body. This is the case because of the defect in the aortic arch. In patients with interrupted aortic arch, oxygen-rich blood from the left side of the heart is not able to reach all areas of the body. In addition to interrupted aortic arch, patients with DiGeorge syndrome may have problems with low calcium, developmental delay and immune system abnormalities. Patients with interrupted aortic arch (particularly those with type B) often have a genetic disorder called DiGeorge syndrome. This defect is usually associated with a large ventricular septal defect (VSD). Interrupted aortic arch is thought to be a result of flawed development of the aortic arch system during the fifth to seventh week of fetal development. This type counts for about four percent of reported cases. Type C is the least common form of interrupted aortic arch. Type C: The interruption occurs between the innominate artery (an artery that comes from the aortic arch, towards the right side of the body) and the left carotid artery.It accounts for about 53 percent of reported cases. Type B is the most common form of interrupted aortic arch. Type B (diagram): The interruption occurs between the left carotid artery and the left subclavian artery.About 30 percent to 40 percent of the infants with interrupted aortic arch have type A. Type A: The interruption occurs just past the left subclavian artery.They are grouped according to the area of the missing piece There are three types of interrupted aortic arch. Interrupted aortic arch (IAA) means a missing portion of the aortic arch. This leads toward the lower half of the body After it leaves the heart, it first goes into the chest to give off blood vessels to the arms and head. The aorta is the main blood vessel that carries oxygen-rich blood away from the heart to the organs of the body.
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