Multifractality in human heartbeat dynamics
Multifractality in human heartbeat dynamics
复制标题
DOI：
10.1038/20924
复制
发表时间：
1999-06-03
期刊：
影响因子：
64.8
通讯作者：
Stanley, HE
中科院分区：
文献类型：
--
作者：
Ivanov, PC;Amaral, LAN;Stanley, HE
有证据表明，健康状态下的生理信号可能具有分形时间结构(1)。在这里，我们研究了由某些生理控制系统产生的时间序列可能是一类特殊的复杂过程的成员，称为多重分形，这需要大量的指数来表征其标度特性（2-6）。我们报告了多重分形在生物动力系统——健康人类心跳中的证据，并证明了健康心率的多重分形特征和非线性性质是用傅立叶相编码的。我们发现了一种危及生命的情况，充血性心力衰竭的多重人格丧失。
There is evidence that physiological signals under healthy conditions may have a fractal temporal structure(1). Here we investigate the possibility that time series generated by certain physiological control systems may be members of a special class of complex processes, termed multifractal, which require a large number of exponents to characterize their scaling properties(2-6). We report on evidence for multifractality in a biological dynamical system, the healthy human heartbeat, and show that the multifractal character and nonlinear properties of the healthy heart rate are encoded in the Fourier phases. We uncover a loss of multifractality for a life-threatening condition, congestive heart failure.