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Figure 1 Perfusion scores for segments within the risk area assessed by myocardial contrast echocardiography 3 to 5 days after primary coronary stenting (PCS) according to their perfusion scores assessed immediately before PCS. p < 0.01 for differences between the groups by chi-square analysis. Perfusion score at 3 to 5 days: white bar = 0; striped bar = 1; black bar = 2.