Fig. 2.

Transthoracic echocardiography showed double aortic arch. Descending aorta which is located in the middle can be seen posterior to left atrium on parasternal short axis view (arrow) (A). Right aortic arch (left arrow) and left aortic arch (right arrow) (B) can be found together and respectively, right aortic arch (C), left aortic arch (D) and their branches on suprasternal view. RAA: right aortic arch, RCCA: right common carotid artery, RSCA: right subclavian artery, LAA: left aortic arch, LCCA: left common carotid artery, LSCA: left subclavian artery.