Results 11 to 20 of about 111,723 (272)

Reduced heart rate variability predicts fatigue severity in individuals with chronic fatigue syndrome/myalgic encephalomyelitis [PDF]

open access: yes, 2020
Heart rate variability (HRV) is an objective, non-invasive tool to assessing autonomic dysfunction in chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME).
Capdevila, Lluis   +3 more
core   +2 more sources

Somatic, but not cognitive-affective, symptoms are associated with reduced heart rate variability in individuals with dysphoria [PDF]

open access: yes, 2015
Background: Somatic, but not cognitive-affective, symptoms of depression have been associated with reduced heart rate variability (HRV), and with poor prognosis in cardiovascular patients.
Buodo, Giulia   +3 more
core   +6 more sources

Artificial intelligence for heart rate variability analyzing with arrhythmias [PDF]

open access: yes, 2019
Introduction. Existing standards of Heart Rate Variability (HRV) technology limit its use to sinus rhythm. A small number of extrasystoles is allowed, if the device used has special procedures for the detection and replacement of ectopic complexes ...
Marchitto, N.   +3 more
core   +1 more source

Determinants of short-period heart rate variability in the general population [PDF]

open access: yes, 2001
Decreased heart rate variability (HRV) is associated with a worse prognosis in a variety of diseases and disorders. We evaluated the determinants of short-period HRV in a random sample of 149 middle-aged men and 137 women from the general population ...
Bolte, H.-D.   +6 more
core   +1 more source

Association between attention and heart rate fluctuations in pathological worriers [PDF]

open access: yes, 2016
Recent data suggests that several psychopathological conditions are associated with alterations in the variability of behavioral and physiological responses.
Amadori, Francesca   +6 more
core   +7 more sources

Nonlinear heart rate variability features for real-life stress detection. Case study : students under stress due to university examination [PDF]

open access: yes, 2011
Background: This study investigates the variations of Heart Rate Variability (HRV) due to a real-life stressor and proposes a classifier based on nonlinear features of HRV for automatic stress detection.
Bracale, Marcello   +2 more
core   +4 more sources

Validity of the Polar V800 heart rate monitor to measure RR intervals at rest [PDF]

open access: yes, 2015
Purpose To assess the validity of RR intervals and short-term heart rate variability (HRV) data obtained from the Polar V800 heart rate monitor, in comparison to an electrocardiograph (ECG). Method Twenty participants completed an active orthostatic test
B Makivić   +36 more
core   +2 more sources

Effects of HRV-Guided vs. Predetermined Block Training on Performance, HRV and Serum Hormones [PDF]

open access: yesInternational Journal of Sports Medicine, 2017
AbstractThe aim of this study was to compare heart rate variability -guided (HRVG) and predetermined (PD) block periodization of high intensity aerobic training (HIT). Endurance performance, neuromuscular performance, heart rate variability (HRV) and serum hormone concentrations were measured before, in the middle and after the 8-week training period ...
Nuuttila, Olli-Pekka   +4 more
openaire   +3 more sources

Preprocessing Methods for Ambulatory HRV Analysis Based on HRV Distribution, Variability and Characteristics (DVC) [PDF]

open access: yesSensors, 2022
Thanks to wearable devices joint with AI algorithms, it is possible to record and analyse physiological parameters such as heart rate variability (HRV) in ambulatory environments. The main downside to such setups is the bad quality of recorded data due to movement, noises, and data losses.
Mouna Benchekroun   +4 more
openaire   +3 more sources

Relationships between parameters of plasma lipoproteines profile and heart rate variability

open access: yesJournal of Education, Health and Sport, 2019
Background. Relationships between parameters of plasma lipoproteines profile and heart rate variability (HRV) are one of the subjects of research at the Truskavetsian Scientific School of Balneology.
Volodymyr Tsymbryla   +3 more
doaj   +1 more source

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