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Figure 2 Frequency of soft plaques, hard plaques, and calcification in the common carotid artery. Acute coronary syndrome patients with multiple coronary plaques had more carotid plaques and calcification compared with patients who only had a single coronary plaque. There were no calcified hard carotid plaques in patients from the single-plaque group. Open bars = single-plaque group; closed bars = multiple-plaque group.