临床资料:男,50岁,头晕、头痛两年余。超声综合描述:左侧椎动脉内径0.43cm,右侧椎动脉内径0.30cm,距入椎前0.35cm处,管腔内透声不清亮...

作者: rantiku 人气: - 评论: 0
问题 临床资料:男,50岁,头晕、头痛两年余。 超声综合描述:左侧椎动脉内径0.43cm,右侧椎动脉内径0.30cm,距入椎前0.35cm处,管腔内透声不清亮,可探及0.4cm×0.27cm中等回声(箭头所指),该段残余管腔内径0.10cm,CDFI:该段血流明显变细,PW:入椎前V43.0cm/s,入椎后V55.0cm/s。见彩图93。 {图2} {图3} {图4} {图5} {图6} {图7} 超声提示:
选项 A.右椎动脉入椎前斑块形成并狭窄 B.右椎动脉发育不全 C.右椎动脉走行变异 D.右椎动脉闭塞
答案 A
解析

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