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大体解剖 > 心血管系统 > 动脉 > 主动脉 > 主动脉弓 > 锁骨下动脉 > 甲状颈干 > 颈升动脉 Anastomotic pathways exist between the ECA, ICA, VA, ophthalmic artery, ascending cervical artery, deep cervical artery, and spinal arteries.3 It is important to note that these anastomoses may not be apparent on initial angiography, but can reveal themselves with changes in regional blood flow during the embolization procedure as the embolization proceeds and the flow of blood and angiographic contrast material find formerly unopacified vascular channels. 
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