Figure 3.

Comparison of receiver operating characteristics curves to discriminate fluid expansion responders and nonresponders. Area under the receiver operator curve (ROC) for respiratory variations of brachial peak velocity (ΔVpeak_brach) was 0.88, for radial arterial pulse pressure variation (ΔPP_rad) it was 0.97, for stroke volume variation measured using the FloTrac/Vigileo monitoring system (ΔSV_Vigileo) it was 0.89 and for central venous pressure (CVP) it was 0.64.