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Heart rate variability during sedentary work and sleep in normal and sleep‐deprived states
Author(s) -
Berg Johannes,
Neely Gregory,
Wiklund Urban,
Landström Ulf
Publication year - 2005
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1111/j.1475-097x.2004.00589.x
Subject(s) - heart rate variability , sleep (system call) , medicine , heart rate , electroencephalography , sleep deprivation , anesthesia , sleep stages , circadian rhythm , audiology , cardiology , polysomnography , blood pressure , psychiatry , computer science , operating system
Summary The possibility of using heart rate variability (HRV) as an indicator of sleepiness was investigated by analysing heart rate (HR) activity and electroencephalography (EEG) recordings from 10 individuals who performed a monotonous attention task for 120 min in both sleep‐deprived and rested states. In both conditions, measurements were collected during 60 min of sleep immediately following a 120 min of non‐sleep (awake phase). Although HR decreased significantly in both the rested and the sleep‐deprived states during the awake phase, HR significantly changed sooner when subjects were sleep‐deprived than when they were rested. No significant changes in HRV were found during the awake phase; however, HRV correlated significantly with alpha and theta power densities when rested but not when sleep‐deprived. During the sleep phase, the total HRV and very low and low frequency HRV components significantly decreased approximately 40 min after sleeping in the sleep‐deprived condition. These HRV components were also significantly and negatively correlated with delta power densities. HRV does not seem to be a viable indicator of sleepiness; however, HRV may be useful for determining sleep stages.