5Demchuk AM, Christou I, Wein TH, et al. Specific transcrainal Doppler flow findings related to the prense and site of arterial occlusion [J]. Stroke,2000,31:140-146.
6Kim SH, Lee JS, Kwon OK, et al. Prevalence study of proximal vertebral artery stenosis using high-resolution contrast-enhanced magnetic resonance angiography[J]. Acta Radiol, 2005,46:314-321.
7Stolz E, Nuckel M, Mendes I, et al. Vertebrobasilar transcranial color-coded duplex ultrasonography: improvement with echo enhancement [J]. Am J Neuroradiol, 2002,23:1051-1054.
8Cloud GC, Markus HS. Diagnosis and management of vertebral artery stenosis[J]. QJM, 2003,96:27-54.
9Wityk RJ, Chang HM, Rosengart A, et al. Proximal extracranial vertebral artery disease in the New England Medical Center Posterior Circulation Registry[J]. Arch Neurol, 1998,55:470-478.
10Moufarrij NA, Little JR, Furlan AJ, et al. Basilar and distal vertebral artery stenosis: long-term follow-up[J]. Stroke,1986,17:938-942.