Review Question - QID 212752

A 63-year-old woman presents to the emergency department with chest pain and shortness of breath. She was recently treated for an Achilles tendon rupture and has a past medical history of diabetes and end stage renal disease. An electrocardiogram (ECG) is performed as seen in Figure A. Her temperature is 99.0°F (37.2°C), blood pressure is 137/98 mmHg, pulse is 130/min, respirations are 19/min, and oxygen saturation is 95% on room air. The patient remains tachycardic after receiving 2 liters of IV fluids. Which of the following is the best next step in management for this patient?