Burdick J A, Adamson J D, Chebib F S, Duperon D F
Act Nerv Super (Praha). 1979 Sep;21(2):97-104.
The EKG of twenty-four children (mean age = = 5.7 years) was individually and continuously recorded in a dental situation. Measures of cardiac activity (heart rate [HR] and heart rate variability [HRV]) were computed by means of a CDC 1,700 and an IBM 360 computer. Histograms of heart rate (HR) and heart rate variability (HRV) measures were generated. -Successive cosine fits were fitted for each 70 beats within an interval for each individual and these cosine fits were also presented in a histogram which represented a frequency analysis of cyclic functions within individuals. Within and between subject correlations were also computed for all measures. Sinus arrhythmia seemed to account for less of the variance than a yet unexplained cosine fit function having a lower limit of 18.6 seconds in this child population. In this population many measures of HRV seem to be negatively correlated with HR.
在牙科治疗环境中，对24名儿童（平均年龄5.7岁）的心电图进行了单独且连续的记录。通过CDC 1700计算机和IBM 360计算机计算心脏活动指标（心率[HR]和心率变异性[HRV]）。生成了心率（HR）和心率变异性（HRV）测量值的直方图。对每个个体在一个时间间隔内的每70次心跳进行连续余弦拟合，并将这些余弦拟合结果也呈现在一个直方图中，该直方图代表个体内循环函数的频率分析。还计算了所有测量值的个体内和个体间相关性。在该儿童群体中，与下限为18.6秒的一个尚未解释的余弦拟合函数相比，窦性心律失常似乎对变异的解释较少。在这个群体中，许多HRV测量值似乎与HR呈负相关。
