Objective To analyse the efficacy of microvascular decompression for hemifacial spasm (HFS) caused by vertebral basilar artery compression. Methods A total of 141 patients with HFS treated by microvascular decompression in our hospital were collected in this study. The improvement of the symptoms after operation was compared between patients with HFS caused by vertebral basilar artery compression (28 cases) and patients with HFS caused by non-vertebral basilar artery compression (113 cases). Results There was no significant difference in the effective rate between the two groups of HFS (96.43%vs. 98.23%,P=0.49) with mean following-up 13.81 ± 1.57 months. And there was no significant difference in the delayed cure rate after surgery between two groups (37.04%vs. 20.72%,χ2=1.38, P>0.05). Conclusion Microvascular decompression is a safe and effective method for the treatment of HFS caused by compressed vertebral basilar artery.%目的：分析显微血管减压术治疗椎-基底动脉压迫型面肌痉挛的临床效果。方法收集我院141例经显微血管减压术治疗的面肌痉挛患者，比较椎-基底动脉压迫型（28例）与非椎-基底动脉压迫型（113例）面肌痉挛患者的术后症状改善状况。结果平均随访（13.81±1.57）个月，两类面肌痉挛的治疗有效率差异无统计学意义（96.43%vs.98.23%，P=0.49），其术后延迟治愈率差异亦无统计学意义（37.04%vs.20.72%，χ2=1.38，P＞0.05）。结论显微血管减压术治疗椎-基底动脉压迫型面肌痉挛安全、有效。
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