Fig 1.

Anteroposterior views of left vertebral angiograms from patient 4 obtained after presentation with SAH (A) and 12 days later before (B) and after (C) treatment with 10-mg intra-arterial verapamil. The arrowhead in A indicates a dissecting aneurysm of the right AICA, which was subsequently coil-embolized. The arrow in B indicates the right P2 PCA segment, which improved from 50% stenosis to 38% stenosis with treatment. The arrowheads in C indicate improvement in angiographic vasospasm in the superior cerebellar arteries and distal left VA, analysis of which was beyond the scope of this study.