Thomassen L, Aarli J A
Department of Neurology, University of Bergen, Haukeland Hospital, Norway.
Acta Neurol Scand. 1994 Oct;90(4):241-4. doi: 10.1111/j.1600-0404.1994.tb02714.x.
Fifty-eight patients with subclavian artery stenosis were classified as having definite or probable vertebrobasilar symptoms, carotid symptoms or no symptoms. The vertebral artery flow pattern was graded as no subclavian steal (Grade 0), systolic deceleration (Grade 1), alternating flow (Grade 2), or reversed flow (Grade 3). We found a statistically significant association between the occurrence of vertebrobasilar symptoms and the subclavian steal phenomenon Grades 2-3. No significant association could be established between time course, type or severity of symptoms and grade of steal phenomenon. The flow disturbance is probably one causal factor for the occurrence of symptoms. Reversed vertebral artery flow is commonly asymptomatic, however, and other non-identified cofactors must be operative in symptomatic patients.
58例锁骨下动脉狭窄患者被分类为具有明确或可能的椎基底动脉症状、颈动脉症状或无症状。椎动脉血流模式分为无锁骨下窃血（0级）、收缩期减速（1级）、交替血流（2级）或反流（3级）。我们发现椎基底动脉症状的出现与2 - 3级锁骨下窃血现象之间存在统计学上的显著关联。症状的时间进程、类型或严重程度与窃血现象分级之间未发现显著关联。血流紊乱可能是症状出现的一个因果因素。然而，椎动脉反流通常无症状，因此在有症状的患者中必定存在其他未明确的协同因素在起作用。
