Results 11 to 20 of about 3,484,140 (246)

Heart rate and respiratory rate influence on heart rate variability repeatability: effects of the correction for the prevailing heart rate [PDF]

Frontiers in Physiology, 2016
Background: Since heart rate variability (HRV) is associated with average heart rate (HR) and respiratory rate (RespRate), alterations in these parameters may impose changes in HRV.
Jakub Sławomir Gąsior, Jerzy Sacha, Piotr Jerzy Jeleń, Jakub Zieliński, Jakub Zieliński, Jacek Przybylski   +5 more
doaj   +4 more sources

Critical Scale-invariance in Healthy Human Heart Rate [PDF]

, 2004
We demonstrate the robust scale-invariance in the probability density function (PDF) of detrended healthy human heart rate increments, which is preserved not only in a quiescent condition, but also in a dynamic state where the mean level of heart rate is dramatically changing.
C. K. Peng, H. V. Huikuri, J. T. Bigger, Jr., J. T. Bigger, Jr., Junichiro Hayano, Ken Kiyono, N. Aoyagi, Naoko Aoyagi, S. Sakata, Seiichiro Sakata, U. Frisch, Y. Yamamoto, Yoshiharu Yamamoto, Zbigniew R. Struzik   +13 more
arxiv   +3 more sources

Scaling graphs of heart rate time series in athletes demonstrate the VLF, LF and HF regions [PDF]

2006 Physiol. Meas. 27 N35-N39, 2006
Scaling analysis of heart rate time series has emerged as an useful tool for assessment of autonomic cardiac control. We investigate the heart rate time series of ten athletes (five males and five females), by applying detrended fluctuation analysis (DFA).
, Andreas Voss, Bonaduce D, Derek Abbott, Francis D P, Ho K K, Juergen Lock, Lars M Brechtel, Mathias Baumert, Willson K, Willson K   +10 more
arxiv   +3 more sources

Multifractality and scale invariance in human heartbeat dynamics [PDF]

, 2007
Human heart rate is known to display complex fluctuations. Evidence of multifractality in heart rate fluctuations in healthy state has been reported [Ivanov et al., Nature {\bf 399}, 461 (1999)]. This multifractal character could be manifested as a dependence on scale or beat number of the probability density functions (PDFs) of the heart rate ...
A. L. Goldberger, Emily S. C. Ching, G. Parisi, Yue-Kin Tsang   +3 more
arxiv   +3 more sources

Donkey Heart Rate and Heart Rate Variability: A Scoping Review

Animals, 2023
Heart rate (HR) and heart rate variability (HRV) are commonly used physiological measures in animals. While several studies exist on horse HRV, less information is available for donkeys.
Marta De Santis, Samanta Seganfreddo, Alberto Greco, Simona Normando, Daniele Benedetti, Franco Mutinelli, Laura Contalbrigo   +6 more
doaj   +3 more sources

A stochastic model for heart rate fluctuations [PDF]

, 2002
Normal human heart rate shows complex fluctuations in time, which is natural, since heart rate is controlled by a large number of different feedback control loops. These unpredictable fluctuations have been shown to display fractal dynamics, long-term correlations, and 1/f noise. These characterizations are statistical and they have been widely studied
A. Voss, A. Voss, A.L. Goldberger, C.-K. Peng, C.-K. Peng, D.J. Mar, F. Kaspar, G. Mayer-Kress, H. Bettermann, H. Kantz, I. Hidaka, I.A. Rezek, J. Fell, J. Gradišek, J. Theiler, J. Timmer, J.A. Palazzolo, J.B. Bassingthwaighte, J.D. Farmer, J.J. Collins, J.S. Richman, J.T. Bigger, Jarmo Hietarinta, K. Ito, L. Glass, M.-K. Yum, N. Iyengar, N.A.J. Gough, N.P. Chau, P. Grassberger, P. Hänggi, P.C. Ivanov, R. Friedrich, S. Pincus, S. Siegert, S.M. Pincus, T. Schreiber, T.A. Kuusela, Tom Kuusela, Tony Shepherd, X.-S. Zhang   +40 more
arxiv   +3 more sources

Anatomy of the Heart with the Highest Heart Rate [PDF]

Journal of Anatomy, 2021
ABSTRACTShrews occupy the lower extreme of the seven orders of magnitude mammals range in size. Their hearts are large relative to body weight and heart rate can exceed a thousand beats a minute. To investigate whether cardiac traits that are typical mammalian scale to these extremes, we assessed the heart of three species of shrew (genusSorex ...
Yun Hee Chang, Boris I. Sheftel, Bjarke Jensen   +2 more
openaire   +4 more sources

RapidHRV: an open-source toolbox for extracting heart rate and heart rate variability [PDF]

PeerJ, 2022
Heart rate and heart rate variability have enabled insight into a myriad of psychophysiological phenomena. There is now an influx of research attempting using these metrics within both laboratory settings (typically derived through electrocardiography or
Peter A. Kirk, Alexander Davidson Bryan, Sarah N. Garfinkel, Oliver J. Robinson   +3 more
doaj   +2 more sources

Heart rate profiles and heart rate variability during scuba diving

Swiss Medical Weekly, 2021
AIMS: The aim of the present study was to describe heart rate profiles and heart rate variability patterns in non-selected scuba divers of different ages under non-experimental real-world conditions.
Claudine Schaller, Andrea Fümm, Simon Bachmann, Luca Oechslin, Yoshi Nakahara, Roger Melliger, Patric Biaggi, Christophe Alain Wyss   +7 more
doaj   +1 more source

The Heart Rate

The American Journal of Psychology, 1933
"This monograph is based on continuous observations with the cardiotachometer."--Pref. ; "First printing, June 1932." ; Bibliography: p. 149-160. ; Mode of access: Internet.
J. P., Ernest P. Boas, Ernest F. Goldschmidt   +2 more
openaire   +4 more sources