1. Heart rate variability in male shift workers in automobile manufacturing factories in South Korea.
- Author
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Lee, Sangyoon, Kim, Ho, Kim, Dae-Hwan, Yum, Myunggul, and Son, Mia
- Subjects
HEART beat ,AUTOMOBILE industry ,MALE employees ,SHIFT systems ,CIRCADIAN rhythms ,CARDIOVASCULAR diseases risk factors ,NIGHT work ,PUBLIC health ,HEALTH - Abstract
Purpose: The aim of this study was to determine the effect of circadian rhythm disruption on cardiovascular autonomic regulation by examining potential differences in heart rate variability (HRV) between day- and night-shift workers. Methods: The study population consisted of 162 workers who worked both day and night shifts in two automobile manufacturing companies who underwent ambulatory 24-h electrocardiogram recording and completed questionnaires and sleep diaries. Both time and frequency domain indices of HRV were compared. Results: HRV parameters (mean RR, SDNN, RMSSD, pNN50, TP, HF, LF, LF/HF ratio) reflecting sympathetic and parasympathetic modulation varied less with activity in night-shift workers. Conclusions: Circadian rhythm-mediated changes in autonomic regulation of the cardiovascular system were blunted in night-shift workers, which could contribute to an increased risk for cardiovascular disease in overnight workers. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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