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Figure 2 CBF response to graded intracoronary doses of acetylcholine (Ach) and a 5% dextrose control infusion (C1) in patients with acute-onset DCM and in control patients (CTRL). Acetylcholine infusion produced an increase in CBF in control patients but no change in patients with DCM. *p < 0.01 versus C1. {dagger}p < 0.05 versus patients with DCM.