Results 261 to 270 of about 7,583,001 (301)

Thermoregulation and Heart Rate Variability

Clinical Science, 1996
1. Heart rate variability is modulated by multiple control systems, including autonomic and hormonal systems. Long-term variability, i.e. the very low-frequency band of the power spectra, has been postulated to reflect thermoregulatory vasomotor control, based upon thermal entrainment experiments.
L A, Fleisher, S M, Frank, D I, Sessler, C, Cheng, T, Matsukawa, C A, Vannier   +5 more
openaire   +2 more sources

Acupuncture and Heart Rate Variability

Acupuncture in Medicine, 2011
The rhythm of life in general, and that of the heart in particular, has always been of interest to physicians and lay people all over the world. Ancient Chinese physicians examined the pulse of the patient’s radial artery as a part of their diagnostic procedure.
Terje, Alraek, Can Ozan, Tan
openaire   +2 more sources

Heart rate variability in weightlifters

Human Physiology, 2009
On the basis of the literature and original data, heart rate variability (HRV) in weightlifters has been studied. The results showed that the distribution mode (a parameter of mathematical analysis that is equal to the most frequent length of RR intervals) indicates the intensity of physical exercise.
E V, Oreshnikov, V F, Tikhonov, T V, Agafonkina   +2 more
openaire   +2 more sources

An Analysis of Heart Rate Variability

Ergonomics, 1973
Proceeding from a formal definition of heart rate variability, some mathematical and statistical techniques from sampling statistics and time series analysis for the analytical evaluation of heart rate variability for ergonomics purposes are presented and compared. The concept of sampling statistics gives a measure of heart rate variability, arrived at
H, Luczak, W, Laurig
openaire   +2 more sources

Heart rate variability in pheochromocytoma

The American Journal of Cardiology, 1995
The results of our study show that parasympathetic tone was higher in patients with pheochromocytoma than in patients with primary hypertension. An unusual spectral form of vagal activity was seen during excessive beta-adrenergic stimulation, while persistent hypertension with an excessive alpha-adrenergic stimulation was responsible for low cardiac ...
B, Dabrowska, A, Dabrowski, P, Pruszczyk, A, Skrobowski, B, Wocial   +4 more
openaire   +2 more sources

Migraine and Heart Rate Variability

Archives of Internal Medicine, 2007
We report preliminary data from our study showing the presence of cardiac autonomic dysfunction in subjects with migraine. A total of 28 subjects (18 women and 10 men; mean±SD age, 36±4.2 years) with active migraine with aura, diagnosed according to criteria of the International Headache Society, were enrolled.The data show that subjects with active ...
PERCIACCANTE A, FIORENTINI A, VALENTE R, GRANATA, Massimo, TUBANI, Luigi   +4 more
openaire   +2 more sources

Heart Rate Variability in Athletes

Sports Medicine, 2003
This review examines the influence on heart rate variability (HRV) indices in athletes from training status, different types of exercise training, sex and ageing, presented from both cross-sectional and longitudinal studies. The predictability of HRV in over-training, athletic condition and athletic performance is also included.
André E, Aubert, Bert, Seps, Frank, Beckers   +2 more
openaire   +2 more sources

Measurement of Heart Rate Variability

Western Journal of Nursing Research, 1995
Heart rate variability (HRV) is a measure of autonomic nervous system balance/imbalance. Measurement and analysis of HRV can be classified into time domain analysis and frequency domain analysis. lime domain analysis is a general measure of autonomic nervous system balance and is based on altered versions of the measurement of the standard deviation of
openaire   +2 more sources

Heart rate variability and sports

Human Physiology, 2016
The article presents a review of the literature and some of their own data on the problem of the possibilities of using the method of the study of heart rate variability in the practice of sports and sports Miedicine.
openaire   +2 more sources

The Effects of Specific Respiratory Rates on Heart Rate and Heart Rate Variability

Applied Psychophysiology and Biofeedback, 2003
In this study respiratory rates of 3, 4, 6, 8, 10, 12, and 14 breaths per minute were employed to investigate the effects of these rates on heart rate variability (HRV). Data were collected 16 times at each respiratory rate on 3 female volunteers, and 12 times on 2 female volunteers.
Hye-Sue, Song, Paul M, Lehrer
openaire   +2 more sources