Review Question - QID 210972

A 33-year-old woman presents to the emergency department with sudden chest pain. The patient was visiting her husband on the oncology floor when she suddenly felt chest pain and became short of breath. The patient has a medical history of asthma. Her temperature is 98.3°F (36.8°C), blood pressure is 129/61 mmHg, pulse is 129/min, respirations are 15/min, and oxygen saturation is 98% on room air. An ECG is notable for diffuse T wave inversions and a chest radiograph is performed as seen in Figure A. An initial set of cardiac troponins is notable for a value of 0.8 ng/mL and a D-dimer is elevated. A repeat ECG 1 hour later is unchanged. Which of the following is the most likely diagnosis?