Review Question - QID 214316

A 45-year-old man presents to the emergency department with chest pain. He states he has a sensation of chest pressure and becomes sweaty whenever he exerts himself. The pain is relieved with rest. At the onset of pain, the patient took aspirin and came to the hospital. The patient has a past medical history of diabetes and hypertension. His temperature is 97.6°F (36.4°C), blood pressure is 154/91 mmHg, pulse is 90/min, respirations are 15/min, and oxygen saturation is 98% on room air. Physical exam is unremarkable revealing a normal S1 and S2 heart sound with clear lung sounds. The patient’s initial chest radiograph is unremarkable. An initial ECG demonstrates a sinus rhythm with no ST segment or T wave changes. Basic labs are ordered as seen below.

Hemoglobin: 14 g/dL
Hematocrit: 41%
Leukocyte count: 5,500/mm^3 with normal differential
Platelet count: 192,000/mm^3
Troponin: < 0.10 ng/dL (normal < 0.10 ng/dL)

The patient’s repeat troponin 3 hours later is unremarkable. Which of the following is the most appropriate next step in management?