A 72-year-old man presents three days after an episode of weakness of his left arm and leg with slurred speech, which resolved completely within 20 minutes. He has hypertension and already takes aspirin, atorvastatin and perindopril. His blood pressure is 138/84 mmHg and his ECG shows sinus rhythm. Carotid duplex ultrasound shows 80% stenosis of the right internal carotid artery and 30% stenosis of the left. Which one of the following is the most appropriate next step in management?
Keep going — a set of ten like this one, one at a time.
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