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Figure 2 Percentage of regions with normal and absent metabolism (upper panel) and electrical activity (lower panel), respectively, in relation to sestamibi uptake. In the upper panel, normal metabolism is defined by an F-18 fluorodeoxyglucose (FDG) uptake 70% and absent metabolism by an uptake <50%. In the lower panel, normal electrical activity is defined by an electrogram amplitude >9 mV and absent activity as <6 mV.