腺苷后处理在心肺转流中的心肌保护作用

目的 观察腺苷药理性后处理在心肺转流心脏直视术中对心肌的保护作用.方法 45例心脏瓣膜置换术患者随机分为三组:腺苷预适应组转流前微量泵入腺苷;腺苷后处理组心脏灌停后术中再灌注时将腺苷加入停搏液中灌入或主动脉开放时由主动脉插管灌入;对照组在灌注液中加入同体积的生理盐水.三组分别于转流前、主动脉开放后2、6、16h采集患者桡动脉血,测血清肌酸激酶同功酶(CK-MB)、肌钙蛋白I(cTnI)、丙二醛(MDA);观察术后机械通气时间及术后正性肌力药物的应用.结果 腺苷预适应和后处理组术后多巴胺用量少,腺苷预适应组开放后2h CK-MB、6h MDA、开放后cTnI较对照组显著降低,后处理组开放后2、6h CK-MB、开放后MDA、cTnI均较对照组显著降低;预适应组和后处理组之间无显著差异(P>0.05).结论 外源性腺苷后处理和预适应在心肺转流中同样有显著的心肌保护作用.

Effect of pharmacological adenosine postconditioning on myocardial protection in patients under cardiopulmonary bypass

Objective To observe the effect of adenosine postconditioning on myocardial protection.Methods Forty-five patients undergoing cardiac valve replacement under cardiopulmonary bypass(CPB) were randomized into three matched groups with 15 cases each.Group A received adenosine before CPB,group B exogenous adenosine by cardioplegia solution or aortic cannula after first cardioplegia,and group C normal saline instead of adenosine.Blood samples were taken to determine the serum concentrations of creatine isoenzyme...