Review Question - QID 210971

A 55-year-old man presents to the emergency department with chest pain and shortness of breath. His pain started 1 hour prior and he describes his pain as heaviness over his sternum. He has a history of hypertension and hyperlipidemia. His temperature is 98.6°F (37.0°C), pulse is 140/min, blood pressure is 100/60 mmHg, respirations are 20/min, and pulse oximetry is 94% on room air. Exam reveals a pale, diaphoretic man who appears to be in distress due to pain. As the patient is being examined, a rhythm change is noted on the cardiac monitor as shown in Figure A which undulates with a normal rhythm. The patient remains conscious and is mentating appropriately. Which of the following is the most appropriate next step in management?