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Figure 1 The effects of bradykinin (0.2, 0.6, 2.0 µg/min), acetylcholine (ACh) (30 µg/min) and papaverine (PA) (12 mg) on the mean arterial pressure (upper panel), heart rate (middle panel) and percent change in coronary blood flow (lower panel) in the ACE inhibitor group (open box) and non-ACE inhibitor group (closed circle). *p < 0.05 versus baseline.