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动态心电图及心率变异性对冠心病及其严重程度的诊断价值的探讨
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摘要
目的 探讨动态心电图(AECG)及心率变异性(HRV)对判断冠状动脉病变及其严重程度的预测价值。方法 选择126例同期行冠状动脉造影(CAG)和24h动态心电图(AECG)监测的病人,按CAG结果分组,对AECG所获得的心率、心律失常、ST-T变化及HRV各项指标进行统计学分析和比较。结果 (1) ST指标(ST、ST/HR)及HRV部分指标(SDNN、RMSSD、TRI、VLI、Poincare Plot散点图)在CAG阳性与CAG阴性两组间以及单支、双支、三支病变三组间比较差异有统计学意义,且随冠脉病变范围的增大,上述指标的变化值加大;而心律失常指标(包括心律失常类型、数量)及HRV中的LF/HF、VAI在上述组间比较差异均无统计学意义。(2) ST、ST/HR与冠脉病变范围及程度呈下相关,SDNN、TRI、VLI与冠脉病变范围及程度呈负相关。(3) ST、ST/HR、SDNN对冠脉病变诊断的真实性较好,且随冠脉病变范围增大其诊断的敏感性递增,其中单一指标诊断以ST/HR价值最大,联合运用时可使对冠心病的诊断价值增高,其中以ST/HR与SDNN并联效果最佳。(4) 单一指标的筛检试验及联合筛检试验均显示对冠心病的诊断价值男性优于女性。结论 (1) ST、ST/HR指标是反映冠心病心肌缺血及冠脉病变严重程度的可靠指标。(2) SDNN、TRI、VLI指标是预测冠心病自主神经功能损害及其严重程度的敏感指标。(3) ST/HR与SDNN联合运用(并联)可提高AECG对冠心病的诊断价值。(4) AECG对冠心病的诊断价值存在性别差异,对男性优于对女性。
Objective: To study the predictable value of the diagnosis of coronary heart disease (CHD) and its extend by ambulatory electrocardiograph (AECG) and heart rate variability (HRV).Methods: we selected 126 patients who had undergone 24h AECG and selective coronary angiography (CAG) in the same period. The groups were divided according to the results of CAG. Then we analyzed and compared with all of the data which had accepted by AECG. Results: (1) Significant difference were found in the variables of ST, ST/HR, SDNN, RMSSD, TRI, VLI and Poincare Plot between the groupes of CHD [CAG(+)] and non-CHD [CAG(-)], and the same results were found in the three groups of single, double and triplet coronary pathology. The changes of the variables above were increasing by the extend of coronary pathology. No significant difference were found in the variables of arrhythmia, LH/HF and VAI. (2) Positive correlation was found between the variables of ST, ST/HR and the extend of coronary pathology. While negative correlation w
    as found between the variables of SDNN, TRI, VLI and the extend of coronary pathology. (3) The variables of ST, ST/HR, SDNN had better truthfulness than those of the others in the diagnosis of CHD. The sensitivity to the diagnosis of CHD was increasing by the extend of coronary pathology. The variable of ST/HR had the best diagnostic value in the three variables when we used any single variable. The diagnostic value to CHD would be improved when we combined these variables for use. Compared with all sorts of patterns of connection, parallel connection of ST/HR and SDNN was the best way of connection. (4) Whatever we used single or
    
    
    combined variables to diagnosis CHD, male was prior to female. Conclusions: (1)ST and ST/HR were the reliable variables of reflecting myocardial ischemia and the extend of coronary pathology. (2) SDNN, TRI and VLI were the sensitive variables of predicting autonomic neuropathy and its extend. (3) Using the method of parralled connection by ST/HR and SDNN could improve the diagnostic value to CHD. (4) Male is prior to female when we used AECG to diagnosis CHD.
引文
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