摘要
目的明确大鼠心肌梗死心电图演变特征及中药干预的作用,为制定大鼠心肌梗死的心电图诊断及药物疗效判定标准提供依据。方法雄性SD大鼠140只,随机分为假手术组、模型组、通心络组、益气药组、活血药组及益气活血药1∶2、2∶1组,每组20只。采用左冠脉前降支结扎法建立大鼠心肌梗死模型,术后第1日各给药组给予相应药物灌胃,假手术组和模型组给予等量蒸馏水灌胃。分别于术前、术后即刻及术后1、2周记录大鼠12导联心电图,对ST段偏移电压值、QRS波群时程和病理性Q波进行统计分析。结果与假手术组比较,模型组术后即刻ST段开始抬高、QRS波群时程明显延长(P<0.01),无病理性Q波出现;1周时各项观察指标均达峰值,2周时有所降低。与模型组2周时比较,益气活血药1∶2、2∶1组均表现出明显的ST段回落、QRS时程缩短和出现病理性Q波大鼠减少,其中益气活血药2∶1组最显著(P<0.01);活血药组仅显示出QRS时程缩短和出现病理性Q波大鼠减少(P<0.05),ST段未见明显回落;益气药组上述3项观察指标无明显改变(P>0.05)。由此初步提出大鼠心肌梗死发作的心电图诊断标准和药物治疗心肌梗死后心肌缺血有效的判定标准。结论心电图检查能对大鼠心肌梗死的演变和药物干预效果做整体且灵敏的评价,为心肌缺血性疾病的实验研究提供了一种较为客观且可供借鉴的判定方法。
Objective To determine the electrocardiographic （ECG） characteristics of myocardial infarction （MI） evolution in rats and the intervention effect of Chinese herbs, and to provide basis for the establishment of the criteria for ECG diagnosis and assessment of drug therapeutic effects of rats MI. Methods Totally 140 male SD rats were randomly divided into sham operation group, model group, replenishing qi group, activating blood group, replenishing qi and activating blood （1∶2） and （2∶1） group as well as Tongxinluo group, each group with 20 rats. The rat MI model was established by ligating the left anterior descending coronary artery. The treatment groups were administrered with corresponding drugs by gavage from the first day after operation. The sham operation group and model group were given the same volume of distilled water. The 12-lead ECGs were recorded before, immediately after, 1st and 2nd week after operation respectively. The voltage value of ST segment deviation, the time limit of QRS complex and the number of animals with pathologic Q wave were evaluated for statistical analysis. Results Model group showed the elevation of ST segment, significantly prolonged time limit of QRS complex （P〈0.01）, and no pathologic Q wave showed immediately after operation compared with sham operation group. And all above observational indexes reached the peak at 1st week and declined at 2nd week after operation. Compared with model group at 2nd week after operation, replenishing qi and activating blood （1∶2） group and （2∶1） group all presented remarkable dropping of ST segment, shortening in time limit of QRS complex and reduction in number of rats with pathologic Q wave, of which 2∶1 group showed the most （P〈0.01）. Activating blood group only displayed decreases in time limit of QRS and number of rats with pathologic Q wave （P〈0.05）, and no significant decline in ST segment. Replenishing qi group demonstrated no significant changes in above three observational indexes （P〉0.05）. Thus, we proposed the criterion for the ECG diagnosis of rats MI as well as the criterion for the ECG assessment of drug therapeutic effects of rats MI. Conclusion ECG can overall and sensitively evaluate the evolution and drug therapeutic effects of MI in rats, thus providing a relatively objective and available assessment method for the experimental studies of myocardial ischemic diseases.
出处
《中国中医药信息杂志》
CAS
CSCD
2014年第6期41-44,共4页
Chinese Journal of Information on Traditional Chinese Medicine
基金
国家自然科学基金(30772850
81173142)
关键词
心肌梗死
心肌缺血
益气活血
心电图
大鼠
myocardial infarction
myocardial ischemia
benefiting qi and activating blood circulation
electrocardiogram
rats
作者简介
通讯作者：郭书文，E-mail：guo1163@163．com
