62.A 35-year-old female presents with dyspnea. The following blood gases

are obtained on room air: pH 7.4, pC02 20 mm Hg, p02 98 mmHg.

Which one of the following should NOT be ineluded on the list of

differential diagnoses?)

A. Opiate overdose

B. Pulmonary embolism

C. Pregnancy

D. Encephalitis

E. Anxiety