Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Circadian heart rate variability rhythm in shift workers

J Freitas1, P Lago, J Puig

  • 1Centro de Medicina Desportiva do Norte, Centro de Estudos da Função Autonómica Corino Andrade, and Departamento de Matematica Aplicada, Oporto University, Portugal.

Journal of Electrocardiology
|January 1, 1997
PubMed
Summary

The circadian pattern of heart rate variability (HRV) is primarily influenced by sleep and wakefulness, not the day-night cycle. Shift workers

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Biomarkers in the pathogenesis and diagnosis of Crohn's perianal fistulas: a systematic review.

Techniques in coloproctology·2026
Same author

A new highly digestible prescription diet containing <i>Bacillus velezensis</i> DSM 15544, fructo-oligosaccharides, plasma immunoglobulin, yeast and sepiolite for the management of acute diarrhea in dogs-a randomized double-blinded, controlled trial.

Frontiers in veterinary science·2025
Same author

Feeding the cosmos: tackling personalized space nutrition and the leaky gut challenge.

NPJ microgravity·2025
Same author

Cone beam CT pulmonary angiography in balloon pulmonary angioplasty for chronic thromboembolic pulmonary hypertension during the program initiation period.

Clinical radiology·2025
Same author

Serum Neutrophil Biomarkers to Predict Crohn's Disease Progression and Infliximab Treatment Outcomes.

United European gastroenterology journal·2024
Same author

Comparison of "IN-REC-SUR-E" and LISA in preterm neonates with respiratory distress syndrome: a randomized controlled trial (IN-REC-LISA trial).

Trials·2024

Area of Science:

  • Cardiology
  • Sleep Medicine
  • Chronobiology

Background:

  • Circadian rhythms significantly impact physiological functions, including cardiovascular regulation.
  • Heart rate variability (HRV) is a sensitive indicator of autonomic nervous system activity.
  • Understanding HRV patterns in shift workers is crucial due to their disrupted sleep-wake cycles.

Purpose of the Study:

  • To investigate the influence of the day-night cycle and sleep-wake periods on the circadian patterns of heart rate variability (HRV).
  • To evaluate hourly HRV parameters in time and frequency domains among male security shift workers.

Main Methods:

  • Twelve male oil refinery security shift workers (aged 39 ± 7 years) underwent 24-hour Holter monitoring.
  • Recordings were conducted during both morning and night work shifts.

Related Experiment Videos

  • Hourly HRV parameters were analyzed in time and frequency domains.

    • Main Results:

    • No statistically significant differences in HRV parameters were observed during awake/work periods between morning and night shifts.
    • During sleep periods (in both shifts), significant increases were noted in very low frequency (VLF) and high-frequency (HF) HRV components, and the proportion of successive R-R interval differences > 50 ms.
    • The low-frequency/high-frequency (LF/HF) ratio decreased during sleep, while absolute LF and R-R interval standard deviation remained unchanged.

    Conclusions:

    • Circadian HRV patterns are primarily associated with the physiological states of sleep and wakefulness, rather than the external day-night cycle.
    • The findings suggest that posture (supine during sleep, standing during wakefulness) plays a significant role in HRV modulation.
    • HRV regulation in shift workers appears independent of the specific timing of the day-night cycle.