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The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task

The very low-frequency (VLF) band of heart rate variability (HRV) has different characteristics compared with other HRV components. Here we investigated differences in HRV changes after a mental stress task. After the task, the high-frequency (HF) band and ratio of high- to low-frequency bands (LF/H...

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Detalles Bibliográficos
Autores principales: Usui, Harunobu, Nishida, Yusuke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5555691/
https://www.ncbi.nlm.nih.gov/pubmed/28806776
http://dx.doi.org/10.1371/journal.pone.0182611
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author Usui, Harunobu
Nishida, Yusuke
author_facet Usui, Harunobu
Nishida, Yusuke
author_sort Usui, Harunobu
collection PubMed
description The very low-frequency (VLF) band of heart rate variability (HRV) has different characteristics compared with other HRV components. Here we investigated differences in HRV changes after a mental stress task. After the task, the high-frequency (HF) band and ratio of high- to low-frequency bands (LF/HF) immediately returned to baseline. We evaluated the characteristics of VLF band changes after a mental stress task. We hypothesized that the VLF band decreases during the Stroop color word task and there would be a delayed recovery for 2 h after the task (i.e., the VLF change would exhibit a “slow recovery”). Nineteen healthy, young subjects were instructed to rest for 10 min, followed by a Stroop color word task for 20 min. After the task, the subjects were instructed to rest for 120 min. For all subjects, R-R interval data were collected; analysis was performed for VLF, HF, and LF/HF ratio. HRV during the rest time and each 15-min interval of the recovery time were compared. An analysis of the covariance was performed to adjust for the HF band and LF/HF ratio as confounding variables of the VLF component. HF and VLF bands significantly decreased and the LF/HF ratio significantly increased during the task compared with those during rest time. During recovery, the VLF band was significantly decreased compared with the rest time. After the task, the HF band and LF/HF ratio immediately returned to baseline and were not significantly different from the resting values. After adjusting for HF and LF/HF ratio, the VLF band had significantly decreased compared with that during rest. The VLF band is the “slow recovery” component and the HF band and LF/HF ratio are the “quick recovery” components of HRV. This VLF characteristic may clarify the unexplained association of the VLF band in cardiovascular disease prevention.
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spelling pubmed-55556912017-08-28 The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task Usui, Harunobu Nishida, Yusuke PLoS One Research Article The very low-frequency (VLF) band of heart rate variability (HRV) has different characteristics compared with other HRV components. Here we investigated differences in HRV changes after a mental stress task. After the task, the high-frequency (HF) band and ratio of high- to low-frequency bands (LF/HF) immediately returned to baseline. We evaluated the characteristics of VLF band changes after a mental stress task. We hypothesized that the VLF band decreases during the Stroop color word task and there would be a delayed recovery for 2 h after the task (i.e., the VLF change would exhibit a “slow recovery”). Nineteen healthy, young subjects were instructed to rest for 10 min, followed by a Stroop color word task for 20 min. After the task, the subjects were instructed to rest for 120 min. For all subjects, R-R interval data were collected; analysis was performed for VLF, HF, and LF/HF ratio. HRV during the rest time and each 15-min interval of the recovery time were compared. An analysis of the covariance was performed to adjust for the HF band and LF/HF ratio as confounding variables of the VLF component. HF and VLF bands significantly decreased and the LF/HF ratio significantly increased during the task compared with those during rest time. During recovery, the VLF band was significantly decreased compared with the rest time. After the task, the HF band and LF/HF ratio immediately returned to baseline and were not significantly different from the resting values. After adjusting for HF and LF/HF ratio, the VLF band had significantly decreased compared with that during rest. The VLF band is the “slow recovery” component and the HF band and LF/HF ratio are the “quick recovery” components of HRV. This VLF characteristic may clarify the unexplained association of the VLF band in cardiovascular disease prevention. Public Library of Science 2017-08-14 /pmc/articles/PMC5555691/ /pubmed/28806776 http://dx.doi.org/10.1371/journal.pone.0182611 Text en © 2017 Usui, Nishida http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Usui, Harunobu
Nishida, Yusuke
The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
title The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
title_full The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
title_fullStr The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
title_full_unstemmed The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
title_short The very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
title_sort very low-frequency band of heart rate variability represents the slow recovery component after a mental stress task
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5555691/
https://www.ncbi.nlm.nih.gov/pubmed/28806776
http://dx.doi.org/10.1371/journal.pone.0182611
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