To study the clinical effects of Gastrodine injection in treating patients with vertebral basilar artery insufficiency(VBI).

观察天麻素注射液对椎基底动脉供血不足患者的临床疗效。

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To determine the effects of neck rotation test in vertebral-basilar artery insufficiency(VBI).

目的探讨转颈试验对椎基底动脉供血不足（VBI）的诊断价值。

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Objective To study the effects of Yunfujing on vertebral basilar artery insufficiency (VBI).

目的观察晕复静对椎基底动脉供血不足病人的临床疗效。

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