Fig. 4From: Carotid blood flow changes following a simulated end-inspiratory occlusion maneuver measured by ultrasound can predict hypotension after the induction of general anesthesia: an observational studyReceiver operating characteristic curves showing the predictability of carotid artery FTc on hypotension after induction of anesthesia in patients. The circle on the curve indicates the optimal cutoff values determined by maximizing the Youden index. AUC, area under the receiver operating characteristic curveBack to article page