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.