TABLE 1:

Changes in vertebral artery diameter

Treatment groups	Baseline (mm)	Vasospasm (mm)	Treatment (mm)
ia nimodipine	0.63 ± 0.04	0.41 ± 0.03*	0.61 ± 0.03†§
it nimodipine	0.69 ± 0.04	0.40 ± 0.08*	0.55 ± 0.55†
ia vehicle	0.55 ± 0.03	0.38 ± 0.02*	0.39 ± 0.02
it vehicle	0.52 ± 0.04	0.40 ± 0.05*	0.36 ± 0.07
ia papaverine	0.51 ± 0.02	0.35 ± 0.01*	0.44 ± 0.03†

All values were derived from n=5 experiments except for IT vehicle group, where n=2 experiments were applied.

^*Statistically significant from baseline values (P < .05).

^†Statistically significant from values obtained at vasospasm (P < .05).

^§Statistically significant from values obtained in IA papaverine treatment.