. . . "Aorta ascendens,"@en . "pars ascendens aortae"@en . "The ascending aorta (AAo) is a portion of the aorta commencing at the upper part of the base of the left ventricle, on a level with the lower border of the third costal cartilage behind the left half of the sternum; it passes obliquely upward, forward, and to the right, in the direction of the heart\u2019s axis, as high as the upper border of the second right costal cartilage, describing a slight curve in its course, and being situated, about 6 centimetres (2.4 in) behind the posterior surface of the sternum. "@en . . . . "142"^^ . . "p_07" . . "12616312" . . "Ascending aorta"@en . . "545"^^ . .