椎动脉开口近段的锁骨下动脉严重狭窄或闭塞导致同侧椎动脉血液逆向流动的现象,血管造影像上表现为与锁骨下动脉病变同侧的椎动脉没有前向血流。锁骨下动脉窃血@颜红兵 Serious stenosis or occlusion of the subclavian artery in the proximal part of the vertebral artery leads to the reverse flow of blood in the ipsilateral vertebral artery. The anteroposterior vertebral artery in the angiographic image shows no forward blood flow on the same side as the subclavian artery. Subclavian artery steal @ Yan Hongbing