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Figure 4 Regression plot describing the correlation between average bipolar electrogram amplitude (BEA) values per section and the extent of infarct transmurality. An exponential fit (BEA = 2.811 x e^{–0.0184 x infarct transmurality extent}) demonstrated the highest correlation (R = 0.72). The symbols indicate infarct transmurality subgroups: solid squares = <30%, solid triangles = 31% to 60%, and solid circles = 61% to 100%.