Scaling exponent values as an ordinary function of the ratio of very low frequency to high frequency powers in heart rate variability over various sleep stages.

doi:10.1007/s11325-016-1320-5

中山醫學大學機構典藏 CSMUIR > 醫學科技學院 > 醫學影像暨放射科學系暨碩士班 > 期刊論文 > Item 310902500/17673

Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/17673

Title:	Scaling exponent values as an ordinary function of the ratio of very low frequency to high frequency powers in heart rate variability over various sleep stages.
Authors:	RJ, Huang CH, Lai SD, Lee WC, Wang LH, Tseng YP, Chen SW, Chang AH, Chung Ting, H
Contributors:	中山醫學大學醫學影像暨放射科學系(所)]
Keywords:	Autonomic nervous system;Periodic limb movement;Sleep apnea;Thermoregulation;Vagus nerve
Date:	2016-09
Issue Date:	2017-04-05T09:06:42Z (UTC)
Publisher:	Sleep Breath.
ISSN:	1520-9512
Abstract:	PURPOSE: To assess the physiological meanings of the detrended fluctuation analysis (DFA) slope α and its relationship to spectral measures in heart rate variability, this study investigated changes of α and its corresponding spectral measures over various night-sleep stages. METHODS: The overall DFA α and natural-logarithm-transformed power values of the spectral parameters ln[high-frequency (HF)], ln[low-frequency (LF)], and ln[very-low-frequency (VLF)], and their relationship from one 5-min proper electrocardiography segment in each of pre-sleep-wakefulness (AWK), non-rapid eye movement stage 2 (N2), slow-wave (N3), the first and the latest rapid-eye movement sleep (REM1, and REM2), were computed in 93 otherwise healthy males (44.1 ± 7.7 years.) with wide-ranged apnea-hypopnea, periodic-limb movement and arousal indices (19.0 ± 20.9, 4.7 ± 9.9, and 10.7 ± 18.2 h, respectively). RESULTS: While ln(HF) dipped from AWK, N2, and N3 to REM1 then rebounded to the origin level at REM2, ln(VLF) dipped from AWK to N2, N3 trough, and then surged to levels surpassing AWKs and N2s at REM1 and REM2. ln(LF/HF), ln(VLF/HF), and α dipped from AWK and N2 to N3 trough, surged to levels surpassing AWKs, and N2s at REM1 then became attenuated at REM2. By general linear modeling, the relationship between α and the corresponding spectral values can be seen over various stages as α = b 0 + 0.147 × ln(VLF/HF) (R (2) = 0.766), regardless of age and sleep-sympathoexcitatory episodes. CONCLUSION: The REM sleep attenuations appeared in ln(HF) and its derivatives, such as ln(LF/HF), ln(VLF/HF), and the overall DFA slope α values. The quantitative function of ln(VLF/HF) describes the α values constantly for overnight sleep stages, and it is not affected by age, LF, PLM, and AHI. Our findings therefore suggest that in sleep studies with spectral HRV measures, ln(VLF/HF) as a surrogate of the overall DFA slope α should be calculated at the same time.
URI:	http://dx.doi.org/10.1007/s11325-016-1320-5 https://ir.csmu.edu.tw:8080/ir/handle/310902500/17673
Relation:	Sleep Breath. 2016 Sep;20(3):975-85.
Appears in Collections:	[醫學影像暨放射科學系暨碩士班] 期刊論文

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