A 58-year-old m an becam e confused and disoriented 5 days after he underwent surgery to rem ove…

A 58-year-old m an becam e confused and disoriented 5 days after he underwent surgery to rem ove necrotic bowel tissue. Physical ndings were high fever (103°F, 39.4°C), blood pressure 90/50 m m Hg, pulse 130 bpm , respirations 30/m in. Pertinent lab values were partial pressure of arterial carbon dioxide (Pa CO2) 30 mm Hg (normal 33-45 m m Hg), bicarbonate (HCO3-) 18 m Eq/L (norm al 22-28 m Eq/L), serum pH 7.31, w hite blood cell count (WBC) 22,000 cells/m m3. Arterial and pulm onary artery catheters were inserted, revealing a cardiac output of 6 L/m in and a pronounced decrease of system ic vascular resistance. Fluid therapy was initiated, but 1 hour later m ean blood pressure was still 60 m m Hg. An intravenous infusion of an appropriate drug was started. Which of the follow ing drugs was m ost likely adm inistered? A. Isoproterenol B. Epinephrine C. Norepinephrine D. Albuterol E. Clonidine

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