Neurological deficit scores on postoperative day 1 according to aprotinin dose for the three bypass conditions. NDS were significantly lower (ie improved)with aprotinin after ultra-low flow bypass at 25°C or 34°C, but not after HCA (P = .57). After ULF at 25°C, NDS were significantly lower with DF dose compared to control (*P < .001) and SF dose (P = .02). NDS was significantly lower with SF dose than control (†, P = .03). After ULF at 34°C, NDS was significantly lower with aprotinin DF dose compared to control (P < .001) and with SF dose (†), and low dose (‡) compared to control (both P = .02). Analysis was performed using two-way ANOVA with Bonferroni adjustment for multiple comparisons. Error bars denote standard deviations. NS = not significant.