Figure 4

|Pf| but not |Pb| strongly correlated with Pms/Pmd in rats before and after ECLS. As shown by multiple linear regression analysis, the correlation between Pms/Pmd and |Pf| and |Pb| reached significance. (A) However, only |Pf| was significantly positively related to Pms/Pmd before and after ECLS (B), indicating that the Pms/Pmd impaired by ECLS might be influenced by |Pf| rather than |Pb|. Pb = backward pressure wave; Pf = forward pressure wave; Pmd = mean diastolic pressure; Pms = mean systolic pressure.