Critical scale invariance in a healthy human heart rate
Critical scale invariance in a healthy human heart rate
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DOI：
10.1103/physrevlett.93.178103
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发表时间：
2004-10-22
影响因子：
8.6
通讯作者：
Yamamoto, Y
中科院分区：
文献类型：
--
作者：
Kiyono, K;Struzik, ZR;Yamamoto, Y
我们证明了去除趋势的健康人体心率增量的概率密度函数(PDF)具有稳健的尺度不变性，它不仅在静态条件下保持不变，而且在心率平均水平急剧变化的动态状态下也保持不变。这种尺度无关的分形结构与在湍流状、串级心率模型中观察到的尺度相关的PDF演化显著不同。这些结果有力地支持了这样一种观点，即健康的人的心率是被控制在不断收敛到临界状态的。
We demonstrate the robust scale-invariance in the probability density function (PDF) of detrended healthy human heart rate increments, which is preserved not only in a quiescent condition, but also in a dynamic state where the mean level of the heart rate is dramatically changing. This scale-independent and fractal structure is markedly different from the scale-dependent PDF evolution observed in a turbulentlike, cascade heart rate model. These results strongly support the view that a healthy human heart rate is controlled to converge continually to a critical state.