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Figure 1 Rates of cardiac death (CD) (open bars) and non-fatal myocardial infarction (MI) (solid bars) in relation to the severity of perfusion abnormality. The number of patients in each category is given in parentheses; the numbers above the bars represent the event rates, and the numbers within the bars denote the actual number of events. The data demonstrate increasing annualized CD and MI rates with increasing summed stress score (SSS).