Search Results - subject:"Heart rate"

Long-range correlations in heart rate variability during computer-mouse work under time pressure

Jiang, Dineng; He, Mulu; Qiu, Yihong; Zhu, Yisheng; … - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 8, pp. 1527-1534

The aim of this study was to investigate the influences of time pressure on long-range correlations in heart rate …

Persistent link: https://www.econbiz.de/10011057171

Multifractal estimates of monofractality in RR-heart series in power spectrum ranges

Makowiec, Danuta; Dudkowska, Aleksandra; Gała̧ska, Rafał - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 17, pp. 3486-3502

nocturnal activity takes place when the analysis moves from LF and VLF to ULF. Only in ULF, the diurnal heart rate variability …

Persistent link: https://www.econbiz.de/10011057334

Detection of changes in the fractal scaling of heart rate and speed in a marathon race

Billat, Véronique L.; Mille-Hamard, Laurence; Meyer, Yves - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 18, pp. 3798-3808

The aim of this study was to detect changes in the fractal scaling behavior of heart rate and speed fluctuations when … the average runner’s speed decreased with fatigue. Scaling analysis in heart rate (HR) and speed (S) dynamics of marathon … exponent (τ). These findings provide evidence of the significant effect of fatigue induced by long exercise on the heart rate …

Persistent link: https://www.econbiz.de/10011064008

Respiratory modulation of heart beat-to-beat interval in diabetic patients

Capurro, Alberto; Malta, Coraci P.; Diambra, Luis; … - In: Physica A: Statistical Mechanics and its Applications 378 (2007) 2, pp. 336-344

We have analyzed simultaneous recordings of respiration and heartbeat intervals in diabetic patients and control subjects. Our main findings are that in diabetic patients the heart beat-to-beat interval variability and cardiorespiratory crosscorrelation are decreased, the autocorrelation time of...

Persistent link: https://www.econbiz.de/10010589193

Long range correlations in the heart rate variability following the injury of cardiac arrest

Tong, Shanbao; Jiang, Dineng; Wang, Ziming; Zhu, Yisheng; … - In: Physica A: Statistical Mechanics and its Applications 380 (2007) C, pp. 250-258

the other hand, the rhythms of the heart rate variability following CA are still not fully understood, and there are … scaling properties of heart rate variability (HRV) after CA by centered-moving-average-based detrended fluctuation analysis …

Persistent link: https://www.econbiz.de/10010590098

Classification of physiologic and synthetic heart rate variability series using base-scale entropy

Li, Jin; Ning, Xinbao - In: Physica A: Statistical Mechanics and its Applications 384 (2007) 2, pp. 423-428

The base-scale entropy method was used as a measure to classify physiologic and synthetic heart rate variability series …. This method enables analyzing very short, non-stationary, and noisy data. We used it to analyze short-term heart rate …

Persistent link: https://www.econbiz.de/10010591763

How random is your heart beat?

Urbanowicz, Krzysztof; Żebrowski, Jan J.; Baranowski, … - In: Physica A: Statistical Mechanics and its Applications 384 (2007) 2, pp. 439-447

We measure the content of random uncorrelated noise in heart rate variability using a general method of noise level … cases analyzed but atrial fibrillation. The nonlinear deterministic content of heart rate variability remains significant …

Persistent link: https://www.econbiz.de/10011059161

Heart beat dynamics during sleep and wake phases: a feedback control approach

Alvarez-Ramirez, Jose; Rodriguez, Eduardo; Carlos … - In: Physica A: Statistical Mechanics and its Applications 348 (2005) C, pp. 281-303

In this paper, we study some aspects of the heart rate variability (HRV) of subjects with normal sinus rhythm (NSR …

Persistent link: https://www.econbiz.de/10010588628

Model for the respiratory modulation of the heart beat-to-beat time interval series

Capurro, Alberto; Diambra, Luis; Malta, C.P. - In: Physica A: Statistical Mechanics and its Applications 355 (2005) 2, pp. 439-460

In this study we present a model for the respiratory modulation of the heart beat-to-beat interval series. The model consists of a set of differential equations used to simulate the membrane potential of a single rabbit sinoatrial node cell, excited with a periodic input signal with added...

Persistent link: https://www.econbiz.de/10010589311

A new method for change-point detection developed for on-line analysis of the heart beat variability during sleep

Staudacher, M.; Telser, S.; Amann, A.; Hinterhuber, H.; … - In: Physica A: Statistical Mechanics and its Applications 349 (2005) 3, pp. 582-596

numerical sleep evaluation based on heart rate variability in the ECG-channel of polysomnographic whole night recordings. It is …

Persistent link: https://www.econbiz.de/10011059928