Review Question - QID 214408

A 55-year-old man presents to the emergency department with dyspnea and shortness of breath. He has no known past medical history as he recently immigrated to the United States. He states that his shortness of breath is worsened by exertion and is relieved by rest. He has had lifelong shortness of breath worsened by cold weather and seasonal changes. His temperature is 97.0°F (36.1°C), blood pressure is 154/91 mmHg, pulse is 88/min, respirations are 27/min, and oxygen saturation is 88% on room air. Physical exam reveals bilateral wheezing with poor air movement. Bilateral lower extremity pitting edema is noted. A chest radiograph is performed as seen in Figure A. The patient is given albuterol, ipratropium, prednisone, and is started on bilevel positive airway pressure (BiPAP). After initial treatment, the patient's oxygen saturation is 94% on bilevel positive airway pressure, and his work of breathing has decreased though he is still notably short of breath. Which of the following treatments could also be given to this patient?