APLN and coronary artery disorder: Plasma apelin levels in AMI patients were 0.85-fold lower than those of controls, and 0.87-fold lower than those of CAD patients (Control vs CAD/AMI, 2.60±0.36 vs 2.54±0.47/2.21±0.34 ng/mL, PControl vs CAD > 0.05, PControl vs AMI < 0.01, PCAD vs AMI < 0.05) (Fig. 1B).