Review Question - QID 109001

A 25-year-old student from the Carribean presents to the emergency department with chest pain, shortness of breath, a feeling that his throat is closing, and diaphoresis. The patient was at home enjoying Thai food when his symptoms began. The patient states that he has had similar episodes that typically occur when he is at school or social events. He admits that his symptoms have drastically improved ever since he began studying at home and not spending time with his friends; however, this episode seemed to come "out of nowhere." The patient has a medical history of anxiety, metabolic syndrome, GERD, and irritable bowel syndrome. His current medications include metformin, a multivitamin, and fish oil. His temperature is 99.5°F (37.5°C), pulse is 112/min, blood pressure is 135/90 mmHg, respirations are 18/min, and oxygen saturation is 99% on room air. Physical exam reveals a tremulous and sweaty young man who appears to be in distress. The patient has a BMI of 33 kg/m^2. The patient's cardiac and pulmonary exams are within normal limits. An ECG is obtained and is seen in Figure A. Troponins are obtained and are currently negative. Which of the following is the most appropriate next step in management?