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Head and neck computed tomography angiography revealed a C5-C6 osteophyte (arrow in panel…
Figure 1.
Head and neck computed tomography angiography revealed a C5-C6 osteophyte (arrow in panel A) in proximity to the right vertebral artery (arrow in panel B).
A-B. Cervical vertebral artery dynamic ultrasonography revealed increased peak systolic flow velocity with right head turn. C. There was no effect of left head turn. D. Intracranial vertebral artery dynamic transcranial Doppler revealed reduced peak systolic flow velocity with right head turn.
Figure 3.
A-B. Digital subtraction angiography revealed…
Figure 3.
A-B. Digital subtraction angiography revealed the right vertebral artery was unremarkable in the…
Figure 3.
A-B. Digital subtraction angiography revealed the right vertebral artery was unremarkable in the standard AP position (A) but turning the head to the right elicited a focal region of stenosis (B, large arrow, magnified view is inset). C. The left vertebral artery was congenitally hypoplastic. AP view with left vertebral artery injection. D-E. There was a chronic-appearing mid-basilar occlusion (small arrows), and the bilateral posterior cerebral, bilateral superior cerebellar, and superior basilar arteries were supplied by the anterior circulation through a robust right posterior communicating artery. Both are lateral views; D is right internal carotid artery injection; E is right vertebral artery injection.
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