Basilar artery diameter measured with CTA in the delayed stage of SAH Basilar artery diameter measured with CTA in the delayed stage of SAH. Error bars represent ± 1 SD. Asterisk indicates significant difference between basilar artery diameter in the control and nimodipine group (P < .05). Basilar artery diameter measured with CTA in the delayed stage of SAH. Error bars represent ± 1 SD. Asterisk indicates significant difference between basilar artery diameter in the control and nimodipine group (P < .05). A.M. Laslo et al. AJNR Am J Neuroradiol 2006;27:624-631 ©2006 by American Society of Neuroradiology