Myocardial Protective Effect of Adenosine Preconditioning Against Ischemia-reperfusion Injury in Patients with Valve Replacement Surgery / 医学研究杂志

ABSTRACT

Objective To investigate the myocardial protective effect of adenosine preconditioning against ischemia-reperfusion injury in patients who were undergone valve replacement during cardiac pulmonary bypass.Methods 42 patients scheduling for valve replacement operation were divided randomly into two groupsexperiment group(n=23) and control group(n=19).Adenosine preconditioning were performed in experiment group before cardiac pulmonary bypass.To estimate the plasma level of cardiotroponin I (cTnI),creatine kinase isoenzyme (CK-MB ),radialis arterial blood was drown at following time points respectively before operation,30 minutes before and after aortic clamp,1 hour and 3 hours after aortic opened.Meanwhile the rate of heart spontaneous rebeating,defibrillation,arrhythmia and cardiac inotropic agents used and its duration were recorded.Results The elevated range of plasm cTnI and CK-MB in experiment group were obviously lower than that in control group.In experiment group,the rate of heart spontaneous rebeating were higher,but the frequency of defibrillation,arrhythmia and the cardiac inotropic agents used and its duration were lower than those of control group.Conclusion Adenosine preconditioning has notable clinical protective effects on myocardial ischemia-reperfusion injury in patients undergone valve replacement during cardiac pulmonary bypass.