Jennings J R, Mack M E
Exp Aging Res. 1984 Spring;10(1):19-23. doi: 10.1080/03610738408258536.
Segments of resting heart rate were submitted to spectral analysis in order to assess changes in spectral power with age. Different frequencies of heart rate variability have been related to vagal and sympathetic cardiac control. Data were from 56 male volunteers ranging in age between 18 and 65 years of age. Spectral results revealed that respiratory sinus arrhythmia declined less with age than lower (vasomotor) frequencies. Assessment of total (rather than relative) power at respiratory frequencies revealed the expected drop in power with age. Thus, the decline in heart rate variability with age may not be due predominantly to a decline in frequencies related to respiration.
对静息心率片段进行频谱分析，以评估频谱功率随年龄的变化。心率变异性的不同频率与迷走神经和交感神经对心脏的控制有关。数据来自56名年龄在18至65岁之间的男性志愿者。频谱结果显示，呼吸性窦性心律失常随年龄的下降幅度小于较低（血管舒缩）频率。对呼吸频率下的总（而非相对）功率进行评估发现，功率随年龄出现预期的下降。因此，心率变异性随年龄的下降可能并非主要由于与呼吸相关频率的下降。
