a dimple or the thoracic descending aorta opposite to the side of the aortic arch. The presence of any of these three D's is pathognomonic of a vascular ring. [6] A diverticulum (also known as ...

A normal aortic valve is composed of three aortic-valve cusps ... 5 cm in length and 20 to 37 mm in diameter), 10 aortic arch, thoracic aorta, and abdominal aorta. The aortic root comprises ...