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Figure 3 Power function plots of the media/lumen ratio versus blood vessel area. Data were pooled for hearts with or without reperfusion. Note the cluster of points at the lower area range (<20 x 10⁴ µm²). Regression coefficients (r) were 0.83 for the sham group, 0.59 for the placebo, 0.75 for the amlodipine group and 0.33 for the enalapril group.