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Delta left ventricular end-diastolic pressure (LVEDP) values (LVEDP 5 minutes after coronary ligation − LVEDP before coronary ligation), in mmHg, among groups. p = 0.063. C = control; ET = exercise training; M = morphine; IR = intermittent ischemia-reperfusion; M+N = morphine plus naloxone; ET+M = exercise training plus morphine; ET+N = exercise training plus naloxone.
