What is arcus aorta?

Arcus aorta, also known as the aortic arch, is a curved portion of the main artery (aorta) that arises from the left ventricle of the heart. It is located in the upper part of the thorax and extends from the level of the second rib to the fourth thoracic vertebra. The aortic arch gives rise to several branches that supply blood to the head, neck, and upper extremities. These branches include the brachiocephalic trunk, left common carotid artery, and left subclavian artery. The aortic arch also contains the ligamentum arteriosum, a fibrous band that connects the pulmonary trunk with the descending aorta. Several important structures can be found in close proximity to the aortic arch, including thoracic duct, esophagus, trachea, and nerves. The arcus aorta is subject to various diseases and abnormalities, such as aortic aneurysm, aortic dissection, coarctation of the aorta, and congenital defects. Treatment of these conditions can involve surgery, medication, or lifestyle modification.