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The ascending aorta segment is of significant due to its susceptibility to aortic dissection, two times more than in the descending aorta. Early detection of dissection is critical because it allows for prompt intervention to prevent potentially life-threatening complications.
Aortic unfolding is an abnormality visible on a chest X-ray, that shows widening of the mediastinum which may mimic the appearance of a thoracic aortic aneurysm. [1]With aging, the ascending portion of the thoracic aorta increases in length by approximately 12% per decade, whereas the diameter increases by just 3% per decade.
They are most commonly located in the abdominal aorta, but can also be located in the thoracic aorta. Aortic aneurysms result from a weakness in the wall of the aorta and increase the risk of aortic rupture. When rupture occurs, massive internal bleeding results and, unless treated immediately, shock and death can occur. One review stated that ...
An aortic sinus, also known as a sinus of Valsalva, [1] is one of the anatomic dilations of the ascending aorta, which occurs just above the aortic valve. These widenings are between the wall of the aorta and each of the three cusps of the aortic valve.
The aorta normally has three small pouches that sit directly above the aortic valve (the sinuses of Valsalva), and an aneurysm of one of these sinuses is a thin-walled swelling. Aneurysms may affect the right (65–85%), non-coronary (10–30%), or rarely the left (< 5%) coronary sinus. [ 1 ]
In the ascending aorta (the portion of the aorta which is almost vertical), one mechanism of injury is torsion (a two-way twisting). [5] There are clinical predictors of an aortic injury. [ 6 ] The predictors include if a patient is older than 50, was an unrestrained patient, has hypotension, has a thoracic injury requiring thoracotomy, has a ...
The brachiocephalic artery is the third branch of the aorta and the first branch from the arch of the aorta. The heart in the lower left is not shown. Course of the ascending aorta (anterior view), as it passes dorsally to the pulmonary trunk but ventrally to the right pulmonary artery .
Aorta segments, with thoracic aorta in area marked in green. Thoracic aortic aneurysm is defined as a cross-sectional diameter exceeding the following cutoff: 4.5 cm in the United States [7] 4.0 cm in South Korea [8] A diameter of 3.5 cm is generally considered dilated. [7]