The determinants of tissue perfusion Michael R Pinsky How hemodynamic therapies influence cardiac output Jean-Louis Teboul Interpretation of urine output Pietro Caironi The physiology of circulatory arrest in humans Mypinder S Sekhon Spinal cord injury: perfusion optimization and physiological burden Geert Meyfroidt All you need to know about cerebral autoregulation Fabio S Taccone What we should know about intrarenal perfusion Patrick Honoré