MRI
Angiography was done, and this MRA was after it and shows:
The proximal part of the left vertebral artery is faintly visible; however, there is no opacification of a long segment of the left vertebral artery about 5.3 cm in CC dimension extending from C6/C3 level.
However, the rest of the left vertebral artery appears well opacified, without an obvious luminal defect or cleft.
The right vertebral artery appears normal.
The common carotid, internal, and external carotid arteries bilaterally appear normal without significant stenotic or obstructive pathology.