A 58-year-old man from Delhi presents to the emergency department with acute onset of right-sided weakness and slurred speech that began 90 minutes ago. His wife reports he was watching television when he suddenly couldn't speak clearly and his right arm went limp. On examination: BP 168/98 mmHg, HR 92/min regular, temperature 37.2°C. Neurological exam shows right facial droop, right arm power 2/5, right leg power 3/5, and expressive aphasia. CT head (non-contrast) is normal. Blood glucose is 118 mg/dL. What is the most appropriate next step in management?