CTICasesDouble aortic arch
Imaging findings
Chest radiograph shows large central pulmonary arteries and posterior indentation of the trachea. CT chest confirms a double aortic arch with a dominant left arch and small right arch forming a vascular ring, along with a large secundum atrial septal defect, a membranous ventricular septal defect, a patent ductus arteriosus, and pulmonary hypertension.
Key takeaways
Double aortic arch is a congenital vascular anomaly where the ascending aorta bifurcates into two arches that encircle and compress the trachea and esophagus, forming a vascular ring. Following the rule of congenital anomalies, it can be associated with multiple congenital shunts (ASD, VSD, PDA).
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