Four cases of @entity9085 are reported. Case 1 was a 38-year-old @entity1 who felt a sudden onset of dizziness when he turned his head to the back. An abnormal positional nystagmus was observed when he rotated his head to the left. A magnetic resonance angiogram (MRA) demonstrated total occlusion of the left vertebral artery (VA). Case 2 was a 31-year-old @entity1 who had a total occlusion of her left VA as observed in the MRA. Case 3 was a 68-year-old @entity1 who noted dizziness. The systolic blood pressure change on his Schellong test was 28 mmHg. On his MRA, severe displacement of the basilar and the vertebral arteries was visible. Case 4 was a 76-year-old @entity1 who noted a @entity1109 . Optokinetic nystagmus was noted with a hyponystagmus pattern, and an eye tracking test showed a saccadic pattern. On her MRA, the vertebrobasilar system was narrowed. The arterial architecture and any @entity850 of the blood vessels could be detected non-invasively by MRA.

Four cases of XXXX .

@entity1 :: ('9606', 'Species') :: ['woman', 'man'] @entity850 :: ('MESH:D003251', 'Disease') :: ['stenosis'] @entity1109 :: ('MESH:D012678', 'Disease') :: ['blackout-like sensation'] @entity9085 :: ('MESH:D014715', 'Disease') :: ['vertebrobasilar insufficiency']
@entity9085 :: (MESH:D014715,Disease) :: ['vertebrobasilar insufficiency']
