The subclavian steal phenomenon results from occlusion of the proximal subclavian or innominate artery that causes reversal of blood flow in the ipsilateral vertebral artery.

• 摘要锁骨下窃血现象是向于锁骨下动脉或无名动脉近端阻塞，引起同侧脊堆动脉血液逆流所导致。