Review Question - QID 210520

A 70-year-old woman presents to the emergency department for evaluation of headache. She states that she has had headaches intermittently over the last several days over her right temple and jaw. She states that her pain is worse when chewing food. She also reports that she has been seeing "black spots" in her visual fields over the last few days intermittently. She has a history of hypertension, polymyalgia rheumatica and atrial fibrillation. Her temperature is 100.4°F (38.0°C), pulse is 80, blood pressure is 135/80 mmHg, and respirations are 16/min. On exam, there is tenderness to palpation over the right temple and anterior scalp. No focal neurologic deficits are appreciated. ESR is 120 mm/hr. Which of the following is the most appropriate next step in management?