Kamineni Institute of Medical Sciences, Narkatpally, Nalgonda, Andhra Pradesh, India.
Singapore Med J. 2010 Nov;51(11):e182-3.
The aortic arch gives rise to three classical branches, namely the brachiocephalic trunk, the left common carotid artery and the left subclavian artery. We report a rare variation of the left common carotid artery and the right vertebral arteries originating from the brachiocephalic trunk, and the left vertebral artery that was arising from the arch of the aorta, proximal to the origin of the left subclavian artery. Variations in the branching pattern of the arch of aorta can alter the cerebral haemodynamics that leads to cerebral abnormalities. Knowledge of the variations in the classical branches of the arch of aorta is important in the diagnosis of intracranial aneurysm after subarachnoid haemorrhage.
主动脉弓发出三个经典分支，即头臂干、左颈总动脉和左锁骨下动脉。我们报告了一种罕见的左颈总动脉和右椎动脉起源于头臂干，以及左椎动脉起源于主动脉弓、左锁骨下动脉起源近端的变异。主动脉弓分支模式的变化会改变脑血流动力学，导致脑异常。了解主动脉弓经典分支的变异对蛛网膜下腔出血后颅内动脉瘤的诊断很重要。
