老年冠心病者无症状心肌缺血阈的分析  

Analysis of the threshold of slient myocardial ischemia in olders with coronary artery disease

作　　者：左京生[1] 于斌[1] 谢玉华[1] 陈少华[1] 

机构地区：[1]广东医学院附属陈星海医院,中山528416

出　　处：《实用心电学杂志》2010年第5期328-330,共3页Journal of Practical Electrocardiology

摘　　要：目的探讨老年冠心病者无症状心肌缺血(SMI)时心肌缺血阈(MIT)的发生规律及临床意义。方法对128例患者进行24h动态心电图(DCG)检测,观察其MIT值、MIT变异度、每次缺血发作持续时间和ST段最大位移,以及昼夜缺血次数。结果共检测984阵心肌缺血,其中932阵为SMI,93.6%在ST段压低时心率加快,心率增快的高低与缺血的程度呈正相关,夜间MIT较低,缺血时间及ST压低程度明显重于昼间(P<0.05)。结论 DCG是临床上检测SMI的重要方法之一,对临床评估SMI的预后及给药有重要临床意义。Objective To investigate occurrence and clinical significance of myocardial ischemic threshold(MIT) in silent myocardial ischemia(SMI) of older with coronary artery disease.Methods To monitor MIT,IV,Tmi,STm,day and nignt ischemia episodes in 128 olders with coronary artery disease by 24h dynamic electrocardiogram.Results Ischemic episodes were 984,932 of them belonged to SMI,93.6% of them had faster heart rate when ST depression occurred; MIT in night was lower,but TMI and STm were higher than those in day(P<0.05).Conclusion Using 24h dynamic electrocardiogram to monitor SMI is one of the important methods and has clinical significance to evaluate the prognosis and treatment effects of SMI patients with coronary artery disease.

关 键 词：老年冠心病 无症状心肌缺血 心肌缺血阈 分析 coronary artery disease myocardial ischemia 临床意义 检测 发作持续时间 SMI MIT 动态心电图 最大位移 心率增快 心率加快 缺血时间 临床评估 方法 发生规律 正相关 

分 类 号：R54[医药卫生—心血管疾病]