A 65-year-old patient is admitted postoperative for a hip fracture. The following lab results were reported: ABG results: pH, 7.5; PaCO2, 26 mm Hg; bicarbonate, 24 mEq/L. On assessment, the patient is dyspneic and has a swollen right calf. The nurse suspects the patient most likely is suffering from:
A a pulmonary embolus.
B heart failure.
C dehydration.
D hyperaldosteronism.