Fasudil treatment ameliorated ischemia‐induced arterial constrictions in hyperglycemic rats. (A) Representative SRA images indicating vessel density calculation. White circle showed the area for measurement. (B) Bar graph of vessel density in cerebral cortex in SD, hyperglycemic and fasudil‐treated hyperglycemic rats one day after tMCAO. n = 4–8 per group, values are mean ± SD, **P < 0.01, SD tMCAO versus DM tMCAO; ***P < 0.001, DM tMCAO versus Fas tMCAO, SD tMCAO versus Fas tMCAO. Bar = 1 mm.