基于“静息-负荷”交替模式的心电运动敏感指标的筛选

Exercise-sensitive Indices Screening from Electrocardiogram Based on Rest-workload Alternating Pattern

心率是目前最常用的运动负荷评价指标,通常将运动心率与目标心率进行比较。然而,心率实际上只反映了心血管系统对运动负荷响应的心脏节律信息,尚需更丰富的指标来获得心脏对运动负荷的动态响应。基于"静息-负荷"交替模式,本文从心电节律与心电波形指标中筛选对运动负荷敏感的指标,包含心率变异性时域参数(4个)与频域参数(4个)、心电波形形态相似性参数(3个)以及心电高频噪声强度(2个)共13个参数。研究表明,RR间期指标(心率指标)是运动强度实时监测的可靠指标,与负荷强度有较强的线性关系。心电波形相关性指标、心率变异性指标可辅助评价运动负荷。

Heart rate is the most common index to directly monitor the level of physical stress by comparing the subject＇s heart rate with an appropriate＂target heart rate＂during exercise.However,heart rate only reveals the cardiac rhythm of the complex cardiovascular changes that take place during exercise.It is essential to get the dynamic response of the heart to exercise with various indices instead of only one single measurement.Based on the rest-workload alternating pattern,this paper screens the sensitive indices of exercise load from electrocardiogram（ECG）rhythm and waveform,including 4time domain indices and 4frequency domain indices of heart rate variability（HRV）,3indices of waveform similarity and 2indices of high frequency noise.In conclusion,RR interval（heart rate）is a reliable index for the realtime monitoring of exercise intensity,which has strong linear correlation with load intensity.The ECG waveform similarity and HRV indices are useful for the evaluation of exercise load.