Figure 2

Intraoperative cerebral angiography results of AIST patients. (A) Preoperative angiogram showing severe basilar artery stenosis (arrow). (B) Conventional balloon predilation. (C) Angiography immediately after stent implantation showed normal blood flow in vertebrobasilar artery with stent implantation. (D, E) Delayed angiography revealed a stent thrombosis with limited blood flow. Stent tines are visible superior to the stagnant contrast. (F) Complete recanalization after treatment with tirofiban.