total and regional bbf , cardiac output ( radionuclide-labeled microsphere method ) , arterial blood pressure , plasma catecholamine and lactate concentrations , blood gases , oxygen contents , and hematocrits were measured during a baseline period , at 1/2 , 2 , and 4 h of sustained hypercarbia and 1/4 and 3/4 h following an abrupt onset of normocarbia .
C0006104
bbf
C0086045
concentrations