【摘要】 主要探讨了运动心率变异信号的关联维数与心血管功能状况之间的关系。以高血压患者和健康人作为对照组,采集了阶梯运动实验的动态心电数据,利用小波变换获得运动心率变异信号,分别计算了运动前、运动中、运动后以及整个运动过程心率变异信号的关联维数,并采用SPSS软件进行了统计分析,发现除了运动中,其余状态的关联维数在两组测试人群中均有明显差异,判别分析的平均分类准确率可达92.2%,因此,应激状态下心率变异信号的关联维数可以作为评测心血管功能状况的有效非线性指标。更多还原

【Abstract】 This paper is mainly devoted to the relationship between the correlation dimension (CD) of exercise heart rate variability (EHRV) and the status of cardiovascular function. Hypertensive patients and healthy people were enrolled in two contrast groups. Dynamic electrocardiograph (ECG) in step exercise was recorded. EHRV was extracted by wavelet transform. The CDs in the whole course of exercise and in three stages of exercise were calculated,the three stages being named rest-before-exercise,during-exercise,and after-exercise. SPSS software was used for statistical analysis. The results revealed all the CDs showed significant difference between two groups except that in the stage of during exercise. By discrimination analysis,the average correct rate was 92.2%.It indicated that the CD in stress status probably could be an effective non-linear parameter for assessing cardiovascular function status.更多还原