Arch Neurol Chicago
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Arch Neurol Chicago · Jan 1985
Vertebrobasilar transient ischemic attacks in internal carotid artery occlusion or tight stenosis.
We studied 12 patients with internal carotid artery (ICA) occlusion or tight stenosis but without vertebrobasilar and subclavian atherosclerosis who suffered vertebrobasilar insufficiency (VBI). The patients with ICA occlusion were compared with a sex- and age-matched control group that had ICA occlusion but no VBI. ⋯ These facts suggested hemodynamic disturbances with "steal VBI." In ICA tight stenosis, VBI symptoms disappeared after endarterectomy but persisted in patients with more than 50% stenosis; this was also suggestive of hemodynamic VBI. Vertebrobasilar insufficiency had a prognostic significance, being associated with an increased occurrence of delayed stroke.