Review Question - QID 214309

A 61-year-old man presents to the emergency department with sudden onset slurring of his speech that started 20 minutes ago. He was eating dinner when his speech suddenly became unintelligible. He also fell to the ground as the right side of his body became weak. The patient has a past medical history of hypertension treated with lisinopril, atrial fibrillation treated with metoprolol and apixaban, and diabetes treated with insulin and metformin. His temperature is 98.0°F (36.7°C), blood pressure is 154/84 mmHg, pulse is 98/min, respirations are 14/min, and oxygen saturation is 98% on room air. On physical exam, the patient exhibits dysarthria and an asymmetric smile. He has a notable pronator drift of his right arm and substantial weakness of his right leg. The rest of his exam is unremarkable. An initial CT scan of the head is unremarkable. Which of the following is the most appropriate next step in management?