Static and dynamic parameters used to guide fluid management. (a) Receiver operating characteristic curves of static parameters: left ventricular end-diastolic area (EDAi), intra-thoracic blood volume index (ITBVI), mean arterial pressure (MAP) and central venous pressure (CVP). (b) Receiver operating characteristic curves for functional hemodynamic parameters: respiratory systolic variation test (RSVT), systolic pressure variation (SPV), pulse pressure variation (PPV), Delta down (dDown) and stroke volume variation (SVV). Note the obvious superiority of dynamic parameters over static parameters in predicting fluid responsiveness. Reproduced with permission from .