This almost certainly produced the symptoms, but they must have been augmented by the stenosis of the subclavian artery. With an intact collateral blood supply through the basilar-vertebral system ...

Patients with vertebrobasilar stenosis are currently being enrolled in two other randomized studies; the Vertebral Artery Stenting Trial (VAST), 8 for stenting of intracranial or extracranial ...

Collateral circulations occur via leptomeningeal ... PCA = Posterior cerebral artery; VA = Vertebral artery. Major cerebral artery territories superimposed on the left hemisphere of normal ...