Abstract:Objective To investigate myocardial protection effect of hydromorphone protection effect on noncardiac surgery in patients with heart disease. Methods Totally 60 heart disease patients without cardiac surgery were randomly divided into control group and experimental group. The control group received intramuscular injection of 2ml of normal saline 15 minutes before induction of general anesthesia, while the experimental group received intramuscular injection of 2ml of hydromorphone. The blood pressure, heart rate and the change of arrhythmia in two groups were recorded before intramuscular injection (T0), before intubation (T1), after intubation (T2), 1 h after intramuscular injection (T3) and after extubation (T4). The concentration of serum creatine kinase isoenzyme, troponin I and myoglobin were detected before the operation, 6 h after intramuscular injection and 24 h after intramuscular injection. Results There was no difference between SBP and DBP (F high pressure=0.074, P = 0.787; F low pressure=1.280, P = 0.262); the heart rate in the experimental group was lower than that in the control group (F = 11.781, P = 0.001); there was no significant difference in the incidence of arrhythmia between the two groups immediately before intramuscular injection (T0), before intubation (T1), after intubation (T2) and 1 h after intramuscular injection (T3) (P > 0.05); the incidence of arrhythmia in the experimental group was lower than that in the control group after extubation (T4) (P < 0.05); the concentration of serum creatine kinase isoenzyme, troponin I and myoglobin in the experimental group were lower than those in the control group 6 h and 24 h after intramuscular injection, and the difference was statistically significant (P < 0.05). Conclusions Hydromorphone preconditioning has myocardial protection effect on heart disease patients without cardiac surgery.