Figure 3
Subsequent angiographic images of the vertebrobasilar arterial network after catheterization of the left subclavian artery and contrast media instillation. Blood flows through the left vertebral artery (A), partly supplies the basilar artery (B and C), but preferentially runs along through the right vertebral artery towards the right subclavian artery (B, C and D) depicting the subclavian-vertebral steal syndrome. Arrow: left vertebral artery.