摘要
对20名受试者进行动态心电频谱研究。结果表明:1.递增负荷运动时,未疲劳心肌的心电积分(IECG)、平均功率频率(MPF)和均方根振幅(RMS)与运动负荷、射血加速度、射血前期线性相关。随着运动负荷的增加,心电频谱发生“右移”,并出现“频率集中”现象。指出心电频谱指标能在一定程度上反映心肌的收缩性.可作为运动时评价心脏负荷的指标。2.优秀运动员的IECG、RMS及其相对值与无训练者有显著性差异。同级负荷工作时,相对值IECG/HR、RMS/HR可同时反映心率和每搏心缩强度的比例,指出该指标可作为评价训练程度的参考指标。同时还分析了心电频谱变化的原因,提出“心肌分级收缩形式”和“心肌收缩功能态”的概念。
In this paper we report the study of the dynamic electrocardiographic frequency spectrum of 20 subjects.The purpose of this study was to find out the characteristics of dynamic electrocardiographic frequency spectrum and to explore the possibility of using it to reflect heart load.The results showed that during exercise with progressively increasing load,the integral electrocardiogram (IECG),the mean power frequency (MPF),and the root-mean-square (RMS) of untired myocardium have a linear relationship with exercise load,ejection accelerateion,pre-ejection period.With the increasing of exercise load,the frequency spectrum becomes 'right shift' accompanied with 'frequency concentration',so we conclude that the index of the frequency spectrum can,to some extent,reflect the myo-cardial contractility and be used as a criterion for measuring the heart load in exercise.The paper analyses the reason for the change in the frequency spectrum mentioned above,putting forward the conception of 'graded heart contraction form' and 'myocardial contractive functional state'.The paper also compares the data of the experimental group with those of the control group.The result demonstrates that advanced athlete's IECG,RMS and their relative values differ greatly from those of untrained people.Working with the same exercise the values of IECG/HR and RMS/HR can show both the proportion of intensity of per-heart-contraction and that of the heart rate,we conclude that these two relative values could be used as reference parameters for evaluating training level.
出处
《青岛海洋大学学报（自然科学版）》
CSCD
1991年第4期127-138,共12页
Journal of Ocean University of Qingdao
关键词
心电图
频谱
递增负荷
心肌收缩
clcctrocardiographic frequency spectrum
graded work load exercise
graded heart contraction form
myocardial contractive functional state
