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Figure 2 Sensitivity and specificity for the distinction between reversibly dysfunctional myocardium (RDM) and irreversibly dysfunctional myocardium are shown at various thresholds of (A) unipolar voltage amplitude (UVA), (B) normalized UVA, and (C) tracer uptake. Optimal threshold was defined as the value yielding sensitivity = specificity for the prediction of RDM. Sensitivity and specificity were 59% at a UVA of 8.4 mV, 65% at a normalized UVA of 83%, and 78% at a tracer uptake of 69%.