Figure 2

CI _PC and CI _ECOM at baseline, during passive leg raising and after fluid challenge in responders (black boxes) and non responders (striated grey boxes). Values are mean ± SD. P value refers to ANOVA (two-factor study with repeated measures on one factor). CI_ECOM = cardiac index determination using ECOM (L.min^-1.m^-2); CI_PC = cardiac index determination using pulse contour analysis (L.min^-1.m^-2); PLR = passive leg raising.