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Figure 4 Typical B-mode ultrasonographic features of the common carotid arteries in acute coronary syndrome patients. Most patients with a solitary discrete coronary plaque had a normal intima-media thickness and no carotid enlargement (A). However, acute coronary syndrome patients with multiple or diffuse coronary plaques (B–F) showed carotid enlargement, an increase of intima-media thickness, soft plaques (*) (B, E), and hard plaques with calcification (arrows) in the more advanced stages of atherosclerosis (E, F).