2) A 70-year-old man with chronic non-ischemic cardiomyopathy and hypertension presents to the emergency department with shortness of breath that started 2 days ago. His last known ejection fraction is 40%. His vitals are blood pressure 110/60 mmHg, heart rate 125 bpm, respiratory rate 20 breaths/min, and oxygen saturation 94% on ambient air. An ECG rhythm strip is shown below. What is the most appropriate treatment for this patient's arrhythmia at this time?
