Effects of the Vertebral Artery Ostium/Subclavian Artery Angle on In-Stent Restenosis after Vertebral Artery Ostium Stenting

Figure 2

A 77-year-old male who presented with dizziness was admitted. His left subclavian arteriography shows severe stenosis of the vertebral artery ostium, and the vertebral artery ostium/subclavian artery angle was 93.9 degrees (a). After stenting of the left vertebral artery, ostium stenosis showed excellent dilatation of the lesion; then, the vertebral artery ostium/subclavian artery angle was 72.0 degrees (b). About ten months later, he was readmitted to the hospital because of dizziness reattack. His neck CTA showed left vertebral artery ostium occlusion (c). Brain MRI in DWI sequence showing left cerebellum restricted diffusion (d). Arrow in (a), stenosis site; arrow in (b), stent site; arrow in (c), occlusion site; arrow in (d), left cerebellum ischemic lesion.