Correlated and uncorrelated regions in heart-rate fluctuations during sleep.

@article{Bunde2000CorrelatedAU,
  title={Correlated and uncorrelated regions in heart-rate fluctuations during sleep.},
  author={Armin Bunde and Shlomo Havlin and Jan W. Kantelhardt and Thomas Penzel and J{\"o}rg Hermann Peter and K Voigt},
  journal={Physical review letters},
  year={2000},
  volume={85 17},
  pages={
          3736-9
        }
}
Healthy sleep consists of several stages: deep sleep, light sleep, and rapid eye movement (REM) sleep. Here we show that these sleep stages can be characterized and distinguished by correlations of heart rates separated by n beats. Using the detrended fluctuation analysis (DFA) up to fourth order we find that long-range correlations reminiscent to the wake phase are present only in the REM phase. In the non-REM phases, the heart rates are uncorrelated above the typical breathing cycle time… 
Breathing during REM and non-REM sleep: correlated versus uncorrelated behaviour
TLDR
Using the detrended fluctuation analysis up to the fourth order, it is found that breath-to-breath intervals and breath volumes separated by several breaths are long-range correlated during the REM stages and during wake states, while in the non-REM stages (deep sleep and light sleep), long- range correlations are absent.
Dynamics of Heart Rate and Sleep Stages in Normals and Patients with Sleep Apnea
TLDR
This work investigated the dynamics of sleep stages over the night and of heart-rate variability during the different sleep stages to create a model for the temporal sequence ofSleep stages and wake states.
Time delay between cardiac and brain activity during sleep transitions
TLDR
This work investigated the time delay between changes of cardiac and brain activity for sleep transitions and found that the cardiac variations during wake-sleep and NREM sleep transitions preceded the EEG changes by 1–3 min but this was not the case for REM sleep transitions.
Correlation study in respiration fluctuations during sleep stages.
TLDR
Results of the mean and standard deviation of respiratory rates show that different sleep stages lead to different autonomic regulations of breathing and exhibit different respiratory rates and fluctuations.
Temporally Resolved Fluctuation Analysis of Sleep ECG
TLDR
This work investigates whether fluctuations of the heart beat rhythm may serve as a surrogate parameter for rapidly changing sleep phenomena, and if these changes are accessible by progressive beat-by-beat analysis of the sleep electrocardiogram (ECG).
Scale-invariant Aspects of Cardiac Dynamics Across Sleep Stages and Circadian Phases
  • P. Ivanov
  • Biology
    2006 International Conference of the IEEE Engineering in Medicine and Biology Society
  • 2006
TLDR
It is found that the probability distribution, the long-range temporal correlations as well as the nonlinear properties of the heartbeat fluctuations are significantly altered with transition from sleep to wake state, across sleep-stages and circadian phases.
Scale-invariant aspects of cardiac dynamics across sleep stages and circadian phases.
We review recent attempts to understand the influence of sleep and wake states, sleep-stage transitions during sleep and the endogenous circadian rhythms on the neuroautonomic regulation of cardiac
Multifractal Analysis of Human Heartbeat in Sleep
We study the dynamical properties of heart rate variability (HRV) in sleep by analysing the scaling behaviour with the multifractal detrended fluctuation analysis method. It is well known that heart
Characterization of sleep stages by correlations in the magnitude and sign of heartbeat increments.
TLDR
The findings suggest that the nonlinear properties of the heartbeat dynamics are more pronounced during REM sleep, which is useful in distinguishing between the sleep stages.
Can one detect sleep stage transitions for on-line sleep scoring by monitoring the heart rate variability?
SummaryQuestion of the studySleep stages are known to differ in the heart rate variability (HRV). REM sleep and wakefulness are characterized by long-range correlations in the heart beat rate. In
...
1
2
3
4
5
...

References

SHOWING 1-8 OF 8 REFERENCES
A Manual of Standardized Terminology, Techniques and Scoring System for Sleep Stages of Human Subjects.
TLDR
Techniques of recording, scoring, and doubtful records are carefully considered, and Recommendations for abbreviations, types of pictorial representation, order of polygraphic tracings are suggested.
Nature (London) 392
  • 239
  • 1998
Nature (London) 258
  • 317 (1975); A. Schenkel, J. Zhang, and Y. C. Zhang, Fractals 1, 47 (1993); M. Amit et al., Fractals 2, 188 (1994); W. Ebeling and A. Neiman, Physica (Amsterdam) 215A, 233
  • 1995
For a general review on long-range correlations in biology and medicine, see
  • Fractals in Science
  • 1994
Phys
  • Rev. Lett. 58, 1100
  • 1987
Clin
  • Chest Med. 6, 595
  • 1985
A manual of Standardized Terminology
The notion "long-range correlations in the heartbeat intervals t i " is equivalent to the notion "anticorrelations in the heartbeat increments dt i t i 2 t i21