摘要目的 观察心肌顿抑在冠状动脉旁路移植手术(CABG)前后的功能变化,明确CABG对弥漫性血管改变患者的再血管化意义.方法 36例左前降支近段99％以上狭窄的慢性闭塞冠心病患者来自哈尔滨医科大学附属第一医院心外科,在医院接受过非体外循环CABG治疗.全部患者于术前1周,术后10天、1个月、3个月应用实时三维超声心动图(RT-3DE)检查左室前降支基底段的前间隔和前壁、中间段的前间隔和前壁、心尖段的前壁和间隔6节段供血,观察手术前后左室前降支供血节段的局部舒张、收缩末期容积,局部、局部-整体射血分数,舒张、收缩末期6、4节段最大容积总和.结果 CABG术前1周和术后10天、1个月、3个月,前壁基底段、前间隔基底段、前壁中间段、前间隔中间段、心尖前壁、心尖间隔6节段舒张、收缩末期容积组间比较差异有统计学意义(F值分别为3.51、3.55、4.08、4.05、2.98、3.01,P均＜0.05；F值分别为4.51、4.55、4.08、3.00、2.96、2.99,P均＜0.05)；上述6节段术后3个月[(6.74±1.23)、(6.64±1.21)、(6.02±1.10)、(5.95±1.09)、(5.82±1.06)、(5.10±0.93)m1;(2.74±0.50)、(2.69±0.49)、(2.51±0.46)、(2.32±0.42)、(2.36±0.43)、(2.03±0.37)ml]与术前1周[(8.33±1.52)、(8.20±1.50)、( 7.43±1.36)、(7.36±1.34)、(7.19±1.31)、(6.29±1.15 )ml; (4.94±0.90)、(4.85±0.88)、(4.53±0.83)、(4.18±0.76)、(4.25±0.78)、(3.65±0.67)ml]比较,差异有统计学意义(P均＜ 0.05).6节段局部、局部-整体射血分数组间比较差异有统计学意义(F值分别为4.56、4.88、4.28、3.15、2.93、2.88,P均＜0.01或＜0.05;F值分别为5.56、5.28、4.98、5.15、3.03、2.78,P均＜0.01或＜0.05)；与术前1周比较,局部射血在术后1个月、局部-整体射血在术后10天、术后1个月有4节段发生明显改善(P均＜ 0.05),在术后3个月有6节段均发生明显改善(P均＜0.05).舒张末期6节段、4节段最大容积总和组间比较差异有统计学意义(F值分别为2.58、5.81,P＜0.05或＜0.01),术后10天开始下降,术后3个月[ (36.27±1.10)、(25.35±1.16)ml]与术前1周[(44.80±1.36)、(31.32±1.43)ml]比较差异有统计学意义(P均＜ 0.05)；收缩末期6节段、4节段最大容积总和组间比较差异有统计学意义(F值分别为5.77、5.57,P均＜0.01),术后10天开始下降,术后1个月[(16.40±0.48)、(11.58±0.51 )ml]、3个月[(14.65±0.45)、(10.26±0.46)ml]与术前1周[(26.40±0.80)、( 18.50±0.84)ml]比较差异有统计学意义(P均＜0.05).结论 心肌顿抑可以通过CABG治疗改善相应节段的心肌收缩、舒张功能和射血分数,弥漫性血管改变患者通过CABG治疗进行再血管化可以改善缺血区的心脏功能.

abstractsObjective To evaluate the functional changes of stunned myocardium before and after coronary artery bypass graft(CABG) treatment,and clear the meaning of revascularization which CABG has brought to patients with diffused vascular changes.Methods A total of 36 patients with 99％ diffused coronary artery stenosis in left anterior descending branch underwent non-pump CABG treatment in the Department of Cardiothoracic Surgery the First affiliated hospital of Harbin Medical University.Real-time three-dimensional echocardiography (RT3DE) was repeatedly performed 1 week before operation and 10 days,1 month,and 3 months after CABG.Regional diastolic volumes,systolic volumes,ejection fractions,regional stroke volume to global diastolic volume and the values of abnormal segments before and after CABG were studied.Results One week before operation and 10 days,1 month and 3 months after CABG,the differences of volumes between groups in the last phases of diastole and systolic were statistically significant in anterior wall basement segment,anterior septal basement segment,anterior wall intercalary segment,anterior septal intercalary segment,anterior wall of apex cordis and septation of apex cordis(F =3.51,3.55,4.08,4.05,2.98,3.01,all P ＜ 0.05; F =4.51,4.55,4.08,3.00,2.96,2.99,all P ＜ 0.05).The values of the six segments mentioned above,3 months after operation[(6.74 ± 1.23),(6.64 ± 1.21),(6.02 ± 1.10),(5.95 ± 1.09),(5.82 ± 1.06),(5.10 ± 0.93)ml; (2.74 ± 0.50),(2.69 ± 0.49),(2.51 ± 0.46),(2.32 ± 0.42),(2.36 ± 0.43),(2.03 ± 0.37)ml] were compared with those of 1 week before operation[(8.33 ± 1.52),(8.20 ± 1.50),(7.43 ± 1.36),(7.36 ± 1.34),(7.19 ± 1.31),(6.29 ± 1.15)ml; (4.94 ± 0.90),(4.85 ± 0.88),(4.53 ± 0.83),(4.18 ± 0.76),(4.25 ± 0.78 ),(3.65 ± 0.67)ml],the differences were statistically significant (all P ＜ 0.05); the differences between groups in regional ejection fractions,regional-global ejection fractions were statistically significant(F =4.56,4.88,4.28,3.15,2.93,2.88,P ＜ 0.01 or ＜ 0.05; F =5.56,5.28,4.98,5.15,3.03,2.78,P ＜ 0.01 or ＜ 0.05).Compared with 1 week before the operation, 1 month after the operation in regional ejection fractions,10 days,1 month in regionalglobal ejection fractions after the operation,4 segments of them were significantly improved(all P ＜ 0.05) and 3 months after operation,all the 6 segments had been improved significantly(all P ＜ 0.05).The maximum volume of the sum of group difference of the 6 segments and the 4 segments in the last phase of diastole was statistically significant(F =2.58,5.81,P ＜ 0.05 or ＜ 0.01 ),and the summation began to decrease 10 days after the operation.The values of 3 months after operation[ (36.27 ± 1.10),(25.35 ± 1.16)ml] were compared with that of 1 week before operation[ (44.80 ± 1.36),(31.32 ± 1.43)ml ] the difference was statistically significant (all P＜ 0.05).The maximum volume summafion comparisons of 6 segments and 4 segments in the last phase of systolic had statistical significance(F =5.77,5.57,all P ＜ 0.01 ),and 10 days after the operation,the summation began to decrease.The values of 1 month[(16.4 0 ± 0.48),(11.58 ±0.51 )ml],and 3 months after operation[ (14.65 ± 0.45),(10.26 ± 0.46)ml],were compared with those of 1 week before operation[ (26.40 ± 0.80),(18.50 ± 0.84)ml],the differences were statistically significant (all P ＜ 0.05).Conclusions Stunned myocardium can be improved through CABG in myocardium systolic,diastole function and ejection fractions of the relevant segments and all of this have proved that patients undergoing CABG revascularization can improve the heart function of the ischemic area.