Figure 4.

Angiography of the right internal carotid artery revealed severe vasospasm of the right M1, A1 and M2 branches (a) with a prolonged transit time consistent with the findings of the computed tomography (CT) angiogram and CT perfusion study. Following stent deployment in the right M1 and M2 branches there was a significant improvement in the calibre of the vessels including the A1 segment (the stent was not deployed in the A1 segment and intra-arterial vasodilators were not infused) (b).