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[单选题]
颅外段椎动脉支架成形术的适应症不包括()
A.症状性椎动脉狭窄直径 >50%,合并对侧椎动脉闭塞
B.症状性椎动脉狭窄≥50%
C.症状性双侧椎动脉狭窄≥50%
D.症状性优势侧椎动脉狭窄直径 ≥70%
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、症状性椎动脉狭窄≥50%
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.症状性椎动脉狭窄直径 >50%,合并对侧椎动脉闭塞
B.症状性椎动脉狭窄≥50%
C.症状性双侧椎动脉狭窄≥50%
D.症状性优势侧椎动脉狭窄直径 ≥70%
B、症状性椎动脉狭窄≥50%
A.全程闭塞:颅外段全程无血流信号
B.节段闭塞:起始段血流信号消失,椎间隙段侧枝动脉血流信号
C.全程闭塞:颅外段全程有血流信号
D.颅内段闭塞:颅外段血流信号存在,CDFI显示无“中心亮带”特征,频谱多普勒显示低速单峰形(无舒张期血流)
A.症状性颈动脉狭窄>70%
B.无症状性颈动脉狭窄>80%
C.无症状双侧颈动脉狭窄均>70%
D.无症状性双侧颈动脉狭窄在50-70%者在全麻大手术前