Calvin Ly, DO, MBA

A 49-year-old man presented to the emergency department (ED) with substernal chest pain that had started an hour earlier. The pain radiated to the left arm, was constant, and was associated with diaphoresis, nausea, and dyspnea. A similar episode 4 days earlier had spontaneously resolved. He denied fever or chills, pleuritic chest pain, vomiting, and diarrhea.