Results 1 to 10 of about 3,462,595 (345)

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

open access: yesFrontiers 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   +5 more
doaj   +4 more sources

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

open access: yes, 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
C. K. Peng   +13 more
core   +2 more sources

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

open access: yes2006 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)
  +10 more
core   +2 more sources

Donkey Heart Rate and Heart Rate Variability: A Scoping Review

open access: yesAnimals, 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   +6 more
doaj   +3 more sources

Multifractality and scale invariance in human heartbeat dynamics [PDF]

open access: yes, 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)].
A. L. Goldberger   +3 more
core   +2 more sources

A stochastic model for heart rate fluctuations [PDF]

open access: yes, 2003
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.
A. Voss   +40 more
core   +2 more sources

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

open access: yesPeerJ, 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   +3 more
doaj   +2 more sources

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

open access: yesJournal 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   +2 more
openaire   +4 more sources

Heart rate profiles and heart rate variability during scuba diving

open access: yesSwiss 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   +7 more
doaj   +1 more source

The Heart Rate

open access: yesThe 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.   +2 more
openaire   +4 more sources

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