Figure 27-9 Window of acceptable values for cardiovascular variables during and after surgery. This hypothetic range of "safe" cardiovascular values for one patient illustrates possible therapies that might be used if actual perioperative values approached the high or low end of that range. The range of safe values, variables treated, and therapies are tailored to the patient and surgical situation. DOPI ISUP, dopamine or Isuprel; HR, heart rate; NEO, Neo-Synephrine; NTG, nitroglycerin; NTP, nitroprusside; PCWP, pulmonary capillary wedge pressure; SBP, systemic blood pressure.