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目的 探讨动态心电图 (DCG)对冠状动脉粥样硬化性心脏病 (简称冠心病 )患者无症状心肌缺血发作的识别价值及规律。 方法 按年龄将患者分为老年组 2 1例 ,非老年组 30例。应用DCG对冠心病 5 1例的心肌缺血进行动态分析。 结果 5 1例经DCG检测共发生缺血性ST段下移 36 8次 ,其中无症状缺血发作占 85 87% ,ST段压低值平均为 ( 1 6 6± 0 13)mm ,78%缺血性ST段下降时心率增快 ,夜间心肌缺血阈值低 ,缺血时间和ST段压低程度劣于日间。老年组混合型心肌缺血及心肌缺血阈变异度 (IV)较对照组有显著差异。 结论 DCG对无症状心肌缺血检测有重要意义 ,临床上应对无症状心肌缺血予以足够的重视
Objective To investigate the value and regularity of ambulatory electrocardiogram (DCG) in detecting asymptomatic myocardial ischemia in patients with coronary atherosclerotic heart disease (CHD). Methods According to the age, the patients were divided into 21 elderly patients and 30 non-elderly patients. Application of DCG on coronary heart disease 51 cases of myocardial ischemia in dynamic analysis. Results A total of 368 ischemic ST segments were found in 51 cases undergoing DCG. Among them, 85.7% were asymptomatic ischemic attacks, and the average value of ST segment depression was (166 ± 0 13) mm, 78% of them were missing The bloody ST segment decreased heart rate faster, night myocardial ischemia threshold is low, ischemic time and ST-segment depression is worse than during the day. Compared with the control group, there were significant differences in the threshold of myocardial ischemia and myocardial ischemia in the elderly group. Conclusions DCG plays an important role in the detection of asymptomatic myocardial ischemia, and should pay enough attention to the clinical treatment of asymptomatic myocardial ischemia.