Review Question - QID 213687

A 66-year-old woman presents to the emergency department with what she believes to be a flare-up of her reflux disease. She states that she was eating dinner when she experienced persistent, burning esophageal discomfort. Her symptoms did not improve with her normal medications, thus prompting her presentation. The only other notable finding in the patient's history is she just found out her husband had died after a prolonged ICU stay. The patient’s vitals are within normal limits. An initial electrocardiogram (ECG) is demonstrated in Figure A. The patient is given aspirin, clopidogrel, nitroglycerin, metoprolol, and heparin. Which of the following is the most appropriate next step in management?