Transverse aorta (aortic arch) on transesophageal echocardiogram

(Panel A) Horizontal (0°) imaging plane demonstrates the transverse aorta (TrAo).
(Panel B) With gentle flexion and anterior rotation the ascending aorta (AAo) may be seen.
(Panel C) Color flow Doppler imaging demonstrates normal flow in the aorta (red-orange) with lower velocity superior vena caval (SVC) flow in the opposite direction (blue).