Review Question - QID 213801

A 58-year-old man presents to the emergency department with shortness of breath. He states his symptoms have been worsening since he was discharged from the hospital 3 days ago after being treated for a myocardial infarction. The patient has a past medical history of diabetes and chronic obstructive pulmonary disease and is an active smoker. His temperature is 98.4°F (36.9°C), blood pressure is 155/94 mmHg, pulse is 105/min, respirations are 16/min, and oxygen saturation is 90% on room air. Physical exam is notable for bilateral crackles and wheezes. An initial ECG demonstrates pathologic Q waves. A chest radiograph is ordered as seen in Figure A. An initial troponin is 0.9 ng/mL and 0.9 ng/mL on repeat 4 hours later. Which of the following is the most appropriate treatment for this patient?