scholarly journals Response: Commentary: Decomposition of Heart Rate Variability Spectrum into a Power-Law Function and a Residual Spectrum

2019 ◽  
Vol 5 ◽  
Author(s):  
Jane Kuo ◽  
Cheng-Deng Kuo
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Power Law ◽  
Residual Spectrum ◽  
Power Law Function ◽  
Heart Rate Variability Spectrum

Aging and spectral characteristics of the nonharmonic component of 24-h heart rate variability

1999 ◽  
Vol 276 (6) ◽  
pp. R1724-R1731 ◽  
Author(s):  
Seiichiro Sakata ◽  
Junichiro Hayano ◽  
Seiji Mukai ◽  
Akiyoshi Okada ◽  
Takao Fujinami
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Power Law ◽  
Daily Life ◽  
Spectral Characteristics ◽  
Normal Subjects ◽  
Break Point ◽  
Total Power ◽  
Interindividual Difference ◽  
Analysis Of Dynamics

To examine whether heart rate variability (HRV) during daily life shows power law behavior independently of age and interindividual difference in the total power, log-log scaled coarse-graining spectra of the nonharmonic component of 24-h HRV were studied in 62 healthy men (age 21–79 yr). The spectra declined with increasing frequency in all subjects, but they appeared as broken lines slightly bending downward, particularly in young subjects with a large total power. Regression of the spectrum by a broken line with a single break point revealed that the spectral exponent (β) was greater in the region below than above the break point (1.63 ± 0.23 vs. 0.96 ± 0.21, P < 0.001). The break point frequency increased with age ( r = 0.51, P < 0.001) and β correlated with age negatively below the break point ( r = 0.39) and positively above the break point ( r = 0.70). The contribution to interindividual difference in total power was greater from the differences in the power spectral density at frequencies closer to both ends of the frequency axis and minimal from that at −3.25 log(Hz), suggesting hingelike movement of the spectral shape at this frequency with the difference in total power. These characteristics of the 24-h HRV spectrum were simulated by an artificial signal generated by adding two noises with different β values. Given that the power law assumption is fundamental to the analysis of dynamics through the log-log scaled spectrum, our observations are substantial for physiological and clinical studies of the heartbeat dynamic during daily life and suggest that the nonharmonic component of HRV in normal subjects during daily life may include at least two 1/ f β fluctuations that differ in dynamics and age dependency.

scholarly journals Power-Law Relationship of Heart Rate Variability as a Predictor of Mortality in the Elderly

Circulation ◽  
1998 ◽  
Vol 97 (20) ◽  
pp. 2031-2036 ◽  
Author(s):  
Heikki V. Huikuri ◽  
Timo H. Mäkikallio ◽  
K. E. Juhani Airaksinen ◽  
Tapio Seppänen ◽  
Pauli Puukka ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Power Law ◽  
The Elderly ◽  
Relationship Of

A new index of the autonomic nervous balance and its clinical usefulness; a power law 1/f like scale of a spectral analysis of the heart rate variability

2006 ◽  
Vol 21 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Yukio Goto ◽  
Toru Komatsu ◽  
Takashi Nakagawa ◽  
Hiroshi Noguchi ◽  
Takako Tsuda
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Power Law ◽  
Clinical Usefulness ◽  
Autonomic Nervous

scholarly journals Nocturnal Heart Rate Variability Spectrum Characterization in Preschool Children With Asthmatic Symptoms

2018 ◽  
Vol 22 (5) ◽  
pp. 1332-1340 ◽  
Author(s):  
Javier Milagro ◽  
Eduardo Gil ◽  
Jesus Lazaro ◽  
Ville-Pekka Seppa ◽  
L. Pekka Malmberg ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Preschool Children ◽  
Heart Rate Variability Spectrum
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