...criptive statistic) 集中趋势指标(measure of location) 集中趋势指标 测量数据分布的中心 变异性指标(measure of variability) 变异性指标 测量数据的分散程度 分布形态指标 刻画数据的分布形态相对于正态分布的差异
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为探索急性心肌梗死时心率变异性指标变化规律，测定44例急性心肌梗死患者的心率变异性时域指标并与50例正常人进行对比。
To investigate characteristics of acute myocardial infarction(AMI) and heart rate variability(HRV), 44 patients with AMI and 50 healthy controls were involved in study.
方法在动态心电图的基础上测量分析32例持续性心房颤动患者的心率变异性指标（SDNN；SDANN；RMSSD和HRV三角指数）的改变。
Of the 32 patient with continual atrial fibrillation, the index of heart rate variability(SDNN; SDANN; RMSSD and HRV triangular index)were analysed on the basis of Holter monitor.
目的：观察有氧运动疗法对老年卧床患者迷走神经张力的维持和对心率变异性相关指标的影响。
OBJECTIVE to observe the effect of aerobic kinesitherapy on vagal tone maintenance and the relevant indices of heart rate variability in elderly bedridden patients.
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