three cases of a rare association: double aortic arch

background vascular ring is less than 1% of congenital heart disease. double aortic arch (daa) is the most common form of it.  its detecting is important because of the effects of pressure on the esophagus and trachea. case report in this study, three children suffering from double aortic arch with symptoms of dysphagia and recurrent aspiration, which in two cases had led to cardiac arrest, were introduced. in all of these studies, computed tomography angiography and chest x-ray were used to diagnose the compression effect of double aortic arch on the esophagus and the surgery provided for treatment of the children. after the surgery, all three patients were monitored in the intensive care unit (icu) for five days without showing any symptoms. conclusion totally, we found that three computed tomography angiography, as a non invasive, high quality method, would be suitable for the diagnosis of this abnormality.