普伐他丁预处理对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响

目的 评价普伐他丁预处理对体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤的影响.方法 择期行体外循环下心脏瓣膜置换术患者60例,年龄18～64岁,体重46～63 kg,性别不限,ASA分级Ⅱ或Ⅲ级.采用随机数字表法,将患者随机分为4组(n=15):对照组(C组)、普伐他丁10 mg组(P1组)、普伐他丁20 mg组(P2组)和普伐他丁40 mg组(P3组).C组和P1-3组于术前第7天开始每晚分别口服安慰剂1片、普伐他丁10 mg、普伐他丁20·mg、普伐他丁40 mg,连续7 d.于停体外循环～术毕(D1)、术毕～术后12 h(D2)、术后12～24 h(D3)和术后24～48 h(D4)各时段,记录多巴胺(≥5μg·kg-1·min-1)和肾上腺素的使用情况.于术前第7天晨、麻醉诱导前、主动脉开放即刻、主动脉开放后2 h、术后24 h和48 h时,检测血浆cTnI和CK-MB的浓度.结果 与C组比较,P1组和P2组各时段多巴胺和肾上腺素的使用率和各时点血浆CK-MB和cTnI浓度差异无统计学意义(P>0.05),P3组D2-4时段多巴胺和肾上腺素的使用率和主动脉开放后2、24、48 h时血浆CK-MB和cTnI浓度降低(P<0.05).结论 口服普伐他丁加mg/d,连续7 d行预处理可减轻体外循环下心脏瓣膜置换术患者心肌缺血再灌注损伤.

Abstract：

Objective To investigate the effect of preoperative pravastatin preconditioning on myocardial ischemia-repedusion(I／R)injury in patients undergoing cardiac valve replacement with cardiopulmonary bypass (CPB).Methods Sixty ASA Ⅱ orⅢpatients of both sexes aged 18-64 yr undergoing cardiac valve replacement under CPB were randomly divided into 4 groups(n=15 each)：control group(group C)and 3 pravastatin groups receiving oral pravastatin 10，20 and 40 mg respectively every night for 7 days before operation(group P1-3).The number of patients receiving dopamine(≥5 μg·kg-1·min-1)and adrenaline was recorded from the termination of CPB to the end of operation，from the end of operation to 12 h after operation，during 12-24 h after operation and during 24-48 h after operation.Venous blood samples were taken from central venous line for measurement of plasme cTnI and CK-MB concentrations at 7 days before operation，before induction of anesthesia，at opening of the aorta and at 2，24 and 48 h after opening of aorta.Results The number of patients receiving dopamine and adrenaline was significantly less in group P3 than in group C(P<0.05).Plasma CK-MB and cTnI concentrations were significantly lower in group P3 than in group C(P<0.05).Conclusion Preconditioning with oral pravastatin(40mg／d for 7 consecutive days)can protect myocardium against I／R injury in patients undergoing cardiac valve replacement with CPB.

Effect of pravastatin preconditioning on myocardial ischemia-reperfusion injury in patients undergoing Valve replacement with CPB

Objective To investigate the effect of preoperative pravastatin preconditioning on myocardial ischemia-repedusion(I／R)injury in patients undergoing cardiac valve replacement with cardiopulmonary bypass (CPB).Methods Sixty ASA Ⅱ orⅢpatients of both sexes aged 18-64 yr undergoing cardiac valve replacement under CPB were randomly divided into 4 groups(n=15 each)：control group(group C)and 3 pravastatin groups receiving oral pravastatin 10，20 and 40 mg respectively every night for 7 days before operation(group P1-3).The number of patients receiving dopamine(≥5 μg·kg-1·min-1)and adrenaline was recorded from the termination of CPB to the end of operation，from the end of operation to 12 h after operation，during 12-24 h after operation and during 24-48 h after operation.Venous blood samples were taken from central venous line for measurement of plasme cTnI and CK-MB concentrations at 7 days before operation，before induction of anesthesia，at opening of the aorta and at 2，24 and 48 h after opening of aorta.Results The number of patients receiving dopamine and adrenaline was significantly less in group P3 than in group C(P<0.05).Plasma CK-MB and cTnI concentrations were significantly lower in group P3 than in group C(P<0.05).Conclusion Preconditioning with oral pravastatin(40mg／d for 7 consecutive days)can protect myocardium against I／R injury in patients undergoing cardiac valve replacement with CPB.