5. A 76-year-old woman presents to the emergency department complaining of an episode of weakness in her right arm and leg. She was sitting down with her husband when the weakness came on, and her husband noticed that she slurred her speech. All of the symptoms resolved within 10 min. Her husband has noticed two to three episodes of a slurred speech lasting a few minutes over the last 6 months but had thought nothing of it. Two months earlier she had a sensation of darkness coming down over her left eye, lasting for a few minutes. She has had type 2 diabetes mellitus for 6 years, controlled on diet. She is hypertensive and suffered a myocardial infarction 3 years previously. She smokes about 10 cigarettes per day and drinks alcohol rarely. Her only medication is enalapril for her blood pressure.Examination findings : She looks frail. Her pulse rate is 88/min and irregular, and blood pressure is 172/94mmHg. The apex beat is displaced to the sixth intercostal space, midaxillary line. Her heart sounds are normal, and a grade 3/6 pansystolic murmur is audible. A soft bruit is audible on auscultation over the left carotid artery. Her dorsalis pedis pulses are not palpable bilaterally, and her posterior tibial is weak on the left and absent on the right. Examination of her chest and abdomen is normal. Neurological examination demonstrates normal tone, power, and reflexes. There is no sensory loss. Funduscopy is normal. What is the diagnosis?• How would you manage this patient?