Figure 2: (A) Intraoperative angiogram demonstrated a patent bypass graft (star sign) but a severe vasospasm of the STA pedicle (arrow). (B) The microcatheter tip (arrowhead) was placed in the beginning of the STA pedicle, and after intra-arterial nimodipine infusion, the vasospasm significant relieved (dashed arrow). (D) The bypass graft remained patent as demonstrated by follow-up CTA one month after the surgery (double arrows).