Correlated and uncorrelated heart rate fluctuations during relaxing visualization
Correlated and uncorrelated heart rate fluctuations during relaxing visualization
The heart rate variability (HRV) of healthy subjects practicing relaxing visualization is studied by use of three multiscale analysis techniques: the detrended fluctuation analysis (DFA), the entropy in natural time ( ENT) and the average wavelet (AWC) coefficient. The scaling exponent of normal interbeat interval increments exhibits characteristics of the presence of long-range correlations. During relaxing visualization the HRV dynamics change in the sense that two new features emerge independent of each other: a respiration-induced periodicity that often dominates the HRV at short scales (<40 interbeat intervals) and the decrease of the scaling exponent at longer scales (40-512 interbeat intervals). In certain cases, the scaling exponent during relaxing visualization indicates the breakdown of long-range correlations. These characteristics have been previously seen in the HRV dynamics during non-REM sleep.
1-6
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Pallikari, F.
093e4aa3-923e-4c6e-b1c3-6a57aa212193
2010
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Pallikari, F.
093e4aa3-923e-4c6e-b1c3-6a57aa212193
Papasimakis, N. and Pallikari, F.
(2010)
Correlated and uncorrelated heart rate fluctuations during relaxing visualization.
Europhysics Letters, 90 (4), .
(doi:10.1209/0295-5075/90/48003).
Abstract
The heart rate variability (HRV) of healthy subjects practicing relaxing visualization is studied by use of three multiscale analysis techniques: the detrended fluctuation analysis (DFA), the entropy in natural time ( ENT) and the average wavelet (AWC) coefficient. The scaling exponent of normal interbeat interval increments exhibits characteristics of the presence of long-range correlations. During relaxing visualization the HRV dynamics change in the sense that two new features emerge independent of each other: a respiration-induced periodicity that often dominates the HRV at short scales (<40 interbeat intervals) and the decrease of the scaling exponent at longer scales (40-512 interbeat intervals). In certain cases, the scaling exponent during relaxing visualization indicates the breakdown of long-range correlations. These characteristics have been previously seen in the HRV dynamics during non-REM sleep.
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Published date: 2010
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 378490
URI: http://eprints.soton.ac.uk/id/eprint/378490
PURE UUID: 013fad79-39cc-4c54-848b-df25f5c13ceb
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Date deposited: 29 Jun 2015 15:56
Last modified: 15 Mar 2024 03:28
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Author:
N. Papasimakis
Author:
F. Pallikari
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