Fig 1.

Patient 10: an aneurysm of the left anterior choroidal artery. Angiogram obtained at anterior-posterior projection (A) shows a diffuse vasospasm involving the terminal internal carotid artery (ICA), the A1 and A2 segments of the anterior cerebral artery (ACA), and the M1 and M2 segments of the middle cerebral artery (MCA). Ten minutes later, after intra-arterial infusion of 1.5 mg of nimodipine, an angiogram at the same projection (B) shows slight improvement but still diffuse vasospasm. After the end of the embolization, under continuous nimodipine infusion at the dose of 1 mg per hour (total, 2 mg), an angiogram (C) shows significant vasorelaxation.