经探测及计算发现、小脑和橄榄体桥脑萎缩病人与VA的管径狭窄和血流量减少有密切而直接关系。

By detection and computation, we found the patients who got cerebellum atrophy or brain stem atrophy often accompanied by the narrow diameter and less blood-flow of VA.

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结果：支架定位准确，13例患者狭窄部位恢复正常管径，3例狭窄程度减少90 %以上，1例减少70 %，无手术并发症发生。

Results:The stent was accurately implanted, total disappearance of stenosis was obtained in 13 patients, the degree of stenosis reduced by more than 90% in 3 patients and 70% in one patient.

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