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Figure 1 Computer-based quantitative analysis of myocardial perfusion. Fraction (%) of total segments (460) at polar map rest and stress single-photon emission computed tomography with severe (normalized tracer uptake 50%; upper panel) and moderate perfusion defects (normalized tracer uptake between 51% and 70%; lower panel) at baseline and at follow-up in placebo (empty bars) and vascular endothelial growth factor-treated groups (filled bars). No differences between the groups were observed. Values are given as mean ± SEM.