Review Question - QID 214534

A 24-year-old woman presents to the emergency department for chest pain that began approximately 1 hour ago. She denies any trauma to the chest and describes the pain as a "pressure-like" sensation affecting the middle of the chest. She has no medical history and takes oral contraceptive pills. A few hours ago she attended a party where she was smoking crack cocaine and subsequently developed this chest pain. Her blood pressure is 175/105 mmHg, pulse is 108/min, and respirations are 18/min with an oxygen saturation of 99% on room air. Chest auscultation is unremarkable. An electrocardiogram is demonstrated in Figure A. Which of the following is the most appropriate next step in management?