Review Question - QID 212854

A 25-year-old obese man presents to the emergency department with chest pain, shortness of breath, and a fever. He states that for the past week he has generally felt ill and has had a cough, sore throat, and fever. Starting today, he began experiencing chest pain and shortness of breath. The patient is otherwise healthy and has no significant past medical history. His temperature is 102°F (38.9°C), blood pressure is 120/85 mmHg, pulse is 119/min, respirations are 26/min, and oxygen saturation is 100% on room air. The patient’s ECG is seen in Figure A, and his chest radiograph is seen in Figure B. Which of the following is likely to be found in this patient on confirmatory testing?