8/13/2023 0 Comments Aortic arch picture![]() ![]() ![]() The diameter of the descending aorta should not exceed 25 mm. By the time it becomes the ascending aorta, the diameter should be < 35–38 mm, and 30 mm at the arch. Blood flows from the upper curvature to the upper regions of the body, located above the heart - namely the arms, neck, and head.Ĭoming out of the heart, the thoracic aorta has a maximum diameter of 40 mm at the root. below the superior border to the manubrium sterni. Its upper border is usually about 2.5 cm. The arch of the aorta forms two curvatures: one with its convexity upward, the other with its convexity forward and to the left. : 216 An anatomical variation is that the left vertebral artery can arise from the aortic arch instead of the left subclavian artery. Finally, the left subclavian artery comes off of the aortic arch to the left of the left common carotid artery and ascends, with the left common carotid, through the superior mediastinum and along the left side of the trachea. Next, the left common carotid artery originates from the aortic arch to the left of the brachiocephalic trunk, then ascends along the left side of the trachea and through the superior mediastinum. The first, and largest, branch of the arch of the aorta is the brachiocephalic trunk, which is to the right and slightly anterior to the other two branches and originates behind the manubrium of the sternum. The aortic arch has three main branches on its superior aspect. Arch of aorta continues as the descending aorta after T4 vertebral body. Inferiorly, the arch of aorta is connected to ligamentum arteriosum while superiorly, it gives rise to three main branches. Apart from T4 vertebral body, other structures such as trachea, oesophagus, and thoracic duct (from front to back) also lies to the left of the aorta. The aorta then passes posteriorly and to the left, anterior to the trachea, and arches over left main bronchus and left pulmonary artery, and reaches to the left side of the T4 vertebral body. The right lung and sternum lies anterior to the aorta at this point. and runs at first upward, arches over the pulmonary trunk, right pulmonary artery, and right main bronchus to lie behind the right second coastal cartilage. The first few centimeters of the ascending aorta and pulmonary trunk lies in the same pericardial sheath. The aorta begins at the level of the upper border of the second/third sternocostal articulation of the right side, behind the ventricular outflow tract and pulmonary trunk. The arch travels backward, so that it ultimately runs to the left of the trachea. The aortic arch, arch of the aorta, or transverse aortic arch ( English: / eɪ ˈ ɔːr t ɪ k/ ) is the part of the aorta between the ascending and descending aorta. ![]()
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