摘要
用间隔直方图与轨迹图，对处于各种状态下的８条草犬心电信号的Ｒ－Ｒ间隔波进行分析。结果显示，对照状态时Ｒ－Ｒ间隔直方图上分布范围宽，轨迹图面积大，类似于奇怪吸引子；而在缺血缺氧或失血状态时，间隔直方图上分布范围窄，轨迹图面积缩小，显示出不动点吸引子的特征，揭示健康心脏的心率变异性大，呈混沌态；而在病理条件下心率变异性小，呈周期性趋势。心率变异性能无创，敏感地反映心血管系统的功能，为临床提供了一个评估心血管功能的指标。
The present paper provides an analysis of heart rate variability (HRV) under different conditions with the histogram and Poincare map on 8 healthy dogs.Results show that the ragion is broader on histogram in control conditions than in carotid artery occlusion or haemorrhage. The Poincare map appears a strange attractor in control conditions, but a point attractor in carotid artery occlusion or haemorrhage. It means that the HRV is greater in control conditions than in abnormal conditions. Studies on HRV may provide more sensitive indicators in assessing cardiovascular function.
出处
《上海医科大学学报》
CSCD
1994年第5期375-378,共4页
Journal of Fudan University(Medical Science)
关键词
间隔直方图
心率轨迹图
心率变异性
R-R interval histogram
Poincare map
attractor
heart rate variability
