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Figure 2 Mean (±SD) relative ¹⁸F-fluorodeoxyglucose (FDG) (A) and technetium-99m-sestamibi (B) uptake values of the four left ventricular wall areas, as well as septal-to-lateral ratios at baseline and during cardiac resynchronization therapy (CRT) in 15 patients. *p < 0.05, p < 0.01, and p < 0.001 compared with FDG.