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Figure 1 Epicardial endothelium-dependent vasomotor response. Epicardial diameter change in response to intracoronary acetylcholine (ACh). Group 1 = patients with hypercholesterolemia adequately controlled; group 2 = patients with hypercholesterolemia inadequately controlled; group 3 = patients without hypercholesterolemia. *p < 0.01 vs. group 2; **p < 0.05 vs. group 2.