The infarct volume ratios of the rats of group A was tended to be smaller and more inconsistent than group B (coefficient of variation (CV) of the group A is 1.08, CV of the group B is 0.12).

• B组大鼠脑梗死体积比明显较A组稳定；变异系数(coefficient of variation； CV )分别为CVB =0.；12；CVA=1