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Figure 3 Receiver operator curve (ROC) analysis for detection of viable regions (normal perfusion, reduced perfusion but preserved metabolism) versus scar regions by the unipolar electrogram amplitude on a patient basis. The solid line represents the ROC curve for all regions (original regions n = 536); the dashed line represents the ROC curve for all regions minus the basal regions with regional unipolar amplitudes <6 mV (n = 500).
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