单侧椎动脉狭窄健侧代偿的MRA研究  

Research on compensatory of contralateral vertebral artery by MRA in unilateral stenosis

作　　者：韩伟[1] 宋沛松[1] 齐伟力[1] 孔抗美[1] 欧阳甲[2] 

机构地区：[1]汕头大学医学院第二附属医院骨外关节脊柱外科,515041 [2]新疆医科大学

出　　处：《中国医师进修杂志（外科版）》2006年第2期42-45,共4页Chinese Journal of Postgraduates of Medicine

摘　　要：目的探索椎动脉单侧狭窄健侧椎动脉代偿时的MRA直径。方法测量椎动脉MRA,分两组(1)正常组50例。(2)椎动脉型颈椎病组26例,26例患者中筛选出13例单侧狭窄直径小于1.6mm的椎动脉型颈椎病患者,并做了统计学检验。结果椎动脉型颈椎病健侧与正常人椎动脉直径比较,健侧直径明显大于正常人椎动脉直径,差异有统计学意义(P<0.01)。健侧椎动脉出现了代偿,MRA表现为椎动脉直径增宽,椎动脉血流丰富。结论当头颈不运动时,一侧椎动脉严重狭窄闭塞后健侧椎动脉可出现代偿,缓解椎-基底动脉血供的不足;但并不能代偿头颈运动不慎时狭窄侧椎-基底动脉系的缺血,而由此引起椎动脉型颈椎病症状的发作。椎动脉型颈椎病的病因复杂多样。Objective To evaluate the MRA by measuring the diameter of the stenosis artery and the contralateral normal vertebral artery with unilateral stenosis. Methods Seventeen- six patients were divided into normal group and vertebral arterial type of cervical spondylosis group. Among 26 vertebral arterial type of cervical spondylosis cases, 13 cases appeared as vertebral arterial type with unilateral stenosis of≤ 1.6 mm in diameter. Statistics assessment of MRA in stenosis and contralateral artery was engaged. Results The unilateral artery stenosis diameter measured 〈 1.6 mm might be well compensated by the contralateral artery. MRA demonstrated affluent blood supply with increased arterial diameter. Conclusion Unilateral vertebral artery stenosis blood supply can be compensated by its counterpart artery. Any adverse head or neck movement that hurts the compensatory mechanism will provoke cerebral ischemic attack.

关 键 词：椎动脉 颈椎病 狭窄 MRA 

分 类 号：R743[医药卫生—神经病学与精神病学] R682.22[医药卫生—临床医学]