nb2-blurred vision - hal

[ArchivalUser]

A previously healthy 57-year-old woman comes to the physician because of three episodes of blurred vision in the right eye over the past 3 weeks; each episode lasts approximately 5 minutes. Retinal examination shows a small refractile body at the bifurcation of a retinal artery. The remainder of the examination shows no abnormalities. Which of the following is the most appropriate next step in diagnosis?
A) Cerebral angiography
B) Echocardiography
C) Electroencephalography
D) Duplex scan of the carotid arteries
E) MRI of the brain