Figure 1: Impact of PEEP on lung and hemodynamic and cerebral perfusion pressure. PEEP: positive end expiratory pressure, ICP: intracranial pressure, CPP: cerebral perfusion pressure, ARDS: acute respiratory distress syndrome, LV: left ventricular, RV: right ventricular, VR: venous return, CO: cardiac output, PVR: pulmonary vascular resistance and PPCs: Postoperative Pulmonary Complications.