【摘要】 <正> 高频心电图(High Frequency ECG)从五十年代初由Langner等应用于临床以来,国内外研究者一致认为其心电信号比常规心电图具有较高的保真度。多数研究证明,冠心病人的高频切迹(High Frequency Notching,以下简称HFN)较正常人明显增多,其中有些冠心病人的常规心电更多还原

【Abstract】 The changes of high frequency notching (HFN) before and after the treadmill exercise test of submaximum intensity were observed on 147 young athletes Can experimental group) and 75 healthy young students (a group for contrast). A preliminary research the significance of high frequency ECG in sports physiology was made.The experiments demonstrated that there was a distinct increase in the number of HFN right after the treadmill exersice test and 3-4 minutes later in both groups There were statistical significances in both the experimental and the control groups when compared before and after the exercise tests. Though the results of the two groups showed similar effect, the increase in the number of HFN in the control group after the exercise test was greater than that of the experimental group (P<0.001) But the conventional ECG’s of both groups did not show any apparent ischemic change. These results suggested that the high frequency ECG was more sensitive in reflecting the conditions of myocardial blood supply According to these results, it seems that the distinct incrase of the number of HFN is the result of temporary ischemia of myocardial fibers, which is a normal physiological phenomenon. Due to the sensitiveness of the high frequency ECG in detecting myocardial ischemia, it is possible that the high frequency ECG may become a new tool for studying the conditions of myocardial blood supply in sports physiology research. It may play a certain part in choosing of athletes with potential ability; in the determination of the physiological and pathological thresholds of intensive training; and in the physiological evaluation of training level. The possible mechanism of the temporary myocardial ischemia was also discussed in this paperIn addition, the relation of HFN to leads; the relation of HFN to sex and to the changes of conventional ECG before and after exercise test were also discussed in this paper.更多还原