Bornas Xavier, Balle Maria, De la Torre-Luque Alejandro, Fiol-Veny Aina, Llabrés Jordi
University of the Balearic Islands, University Research Institute on Health Sciences, Spain.
University of the Balearic Islands, University Research Institute on Health Sciences, Spain.
Int J Psychophysiol. 2015 Oct;98(1):112-8. doi: 10.1016/j.ijpsycho.2015.07.007. Epub 2015 Jul 26.
Nonlinear measures can capture the complex structure of the heart beating, and recordings taken while the individual performs daily activities may help to understand the cardiac system's output in natural conditions. As healthy systems are characterized by having highly complex outputs, we hypothesized that the cardiac output from high anxious adolescents should be less complex than the output from their low anxious counterparts. In this study ECG was recorded for two hours in 50 adolescents while they performed regular school activities. Fractal dimension (FD), scaling exponents and multiscale entropy were calculated on the interbeat intervals time series. Both FD and entropy were significantly lower in the high-anxious group than the low-anxious group. These results suggest different heart-related regulation in adolescents who suffered from high anxious symptomatology.
非线性测量方法能够捕捉心脏跳动的复杂结构，而在个体进行日常活动时所记录的数据，可能有助于了解自然条件下心脏系统的输出情况。由于健康系统的特点是具有高度复杂的输出，我们推测，高焦虑青少年的心脏输出复杂性应低于低焦虑青少年。在本研究中，对50名青少年在进行常规学校活动时的心电图进行了两小时的记录。计算了心跳间期时间序列的分形维数（FD）、标度指数和多尺度熵。高焦虑组的FD和熵均显著低于低焦虑组。这些结果表明，患有高焦虑症状的青少年存在不同的心脏相关调节。
