Department of Radiology, University of California, San Francisco, CA 94143-0628, USA.
Clin Radiol. 2012 Jan;67(1):28-31. doi: 10.1016/j.crad.2011.04.004. Epub 2011 Nov 8.
To investigate whether there is a link between bovine arch and thoracic aortic aneurysm.
Computed tomography (CT) and magnetic resonance imaging (MRI) images of the thorax of 191 patients with dilated thoracic aortas and 391 consecutive, unselected patients as controls were retrospectively reviewed. Bovine arch was considered present if either a shared origin of the left common carotid and innominate arteries or an origin of the left common carotid from the innominate artery was identified. A chi-square test was used to evaluate the significance of differences between subgroups.
A trend towards increased prevalence of bovine arch was seen in patients with dilated aortas (26.2%) compared to controls (20.5%, p=0.12). The association was statistically significant in patients over 70 years old (31.9%, p=0.019) and when dilation involved the aortic arch (47.6%, p=0.003).
An association between bovine arch and aortic dilation is seen in older patients, and when dilation involves the aortic arch. Bovine arch should be considered a potential risk factor for thoracic aortic aneurysm.
探讨牛型主动脉弓与胸主动脉瘤之间是否存在关联。
回顾性分析了 191 例胸主动脉扩张患者和 391 例连续、未选择的对照组患者的胸部计算机断层扫描（CT）和磁共振成像（MRI）图像。如果左颈总动脉和无名动脉有共同起源，或者左颈总动脉起源于无名动脉，则认为存在牛型主动脉弓。使用卡方检验评估亚组之间差异的显著性。
与对照组（20.5%）相比，扩张型主动脉患者（26.2%）的牛型主动脉弓患病率呈上升趋势（p=0.12）。在 70 岁以上的患者中（31.9%，p=0.019）和当主动脉弓扩张时（47.6%，p=0.003），这种关联具有统计学意义。
在老年患者和主动脉弓扩张时，牛型主动脉弓与主动脉扩张之间存在关联。牛型主动脉弓应被视为胸主动脉瘤的潜在危险因素。
