![Figure 1.](/tables/jmc3104w-g001.jpg)
Figure 1. Diagnostic angiography with digital subtraction imaging. (a) Arch aortogram showing blocked segment of innominate artery (arrows); (b) magnified view of left vertebral artery arising from left subclavian artery with a severe stenosis at vertebral origin (red circle); (c) magnified view of right vertebral artery (1) that has a retrograde/caudal flow and fills right subclavian (2) and right common carotid (3) arteries.
![Figure 2.](/tables/jmc3104w-g002.jpg)
Figure 2. Magnified pictures of left vertebral artery ostial intervention and stent embolization. (a) Vertebral ostium before intervention; (b) partially improved stenosis after ballooning and stenting; (c) short stent visible at vertebral ostium (white arrow heads); (d) embolized stent visualized in distal left vertebral artery above the mandibular line (white arrowheads).
![Figure 3.](/tables/jmc3104w-g003.jpg)
Figure 3. Drag-back technique to manage the embolized stent. (a) Balloon tracked beyond the stent and inflated at low pressure; (b) embolized stent being dragged back by gentle traction on the balloon; (c) embolized stent successfully dragged back to the proximal-most segment of left vertebral artery and anchored against the vessel wall by inflating the same balloon at higher pressure; (d) final result after deploying another stent starting from vertebral artery ostium and overlapping the first stent.