Fig 2.

Patient 2: an aneurysm of the right posterior communicating artery. An angiogram obtained at the right anterior oblique projection (A) shows a vasospasm at the supraclinoid ICA, the A1 and A2 segments of the ACA, and the M1 and M2 segments of the MCA. Fourteen minutes later, after intra-arterial infusion of 2 mg of nimodipine, this angiogram (B) shows some degree of vasorelaxation, especially in the proximal segments of the ACA. Final angiogram at the same projection after completion of embolization (C), with continuous intra-arterial infusion of 1.5 mg of nimodipine throughout the procedure, demonstrates complete disappearance of the proximal vasospasm and near-complete clearance of the distal spasm as well as occlusion of the aneurysm.