老年冠心病患者无症状心肌缺血阈的动态心电图分析  

Threshold of myocardial ischemia of olders with coronary artery disease by ambulatory electrocardiogram

作　　者：周智[1] 王鑫[2] 王权[2] 

机构地区：[1]海军总医院干一科,北京100037 [2]吉林大学公共卫生学院,放射医学班130021

出　　处：《中国实验诊断学》2008年第2期228-229,共2页Chinese Journal of Laboratory Diagnosis

摘　　要：目的探讨24小时动态心电图对老年冠心病无症状心肌缺血阈值的临床意义。方法对78例老年冠心病患者进行24小时动态心电图检测,以观察心肌缺血阈值(MIT)、MIT的变异(IV),以及每阵缺血发作持续时间(TMI)和ST段最大位移以及昼夜缺血阵数(IN)。结果共检出582阵心肌缺血,92.1%在ST段压低时心率加快,夜间心肌缺血阈值较低,但缺血时间及ST段压低程度明显重于昼间。结论高心肌缺血阈与心肌耗氧增加有关;低心肌缺血阈与冠状动脉张力有关。Objective To evaluate clinical significance of silence myocardial isehemic threshold of older with coronary artery disease by ambulatory electrocardiogram. Methods To observe the myocardial ischemic threshold, variability of myocardial isehemic threshold,and duration of ischemic episodes,seventy-eight cases with coronary disease were investigated by 24 hour ambulatory electrocardiogram. Results There were 91.2% fast heart rate and ST depression among 582 cases ischemic episodes and lower threshold longer mean ischemic time as well as deeper ST depression in the night. Conclusion The results suggested the higher the myocardial isehemic threshold, the more myocardial oxyen consumption. The lower myocardial ischemic threshold relates with the tension of coronary artery.

关 键 词：冠心病 心肌缺血阈 24小时动态心电图 

分 类 号：R541.4[医药卫生—心血管疾病] R256.22[医药卫生—内科学]