Results 251 to 260 of about 820,034 (298)
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Mental load, heart rate and heart rate variability
Psychologische Forschung, 1970"Several investigators have shown that diminished sinus arrhythmia can be seen as an indication of increased mental load. The present experiment deals with the influence of different levels of mental load, operationalized as the number of binary choices per minute, on the regularity of the heart rate. Also . . .
Blitz, P.S., Hoogstraten, J., Mulder, G.
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Heart rate and heart rate variability, a pharmacological target
Cardiovascular Drugs and Therapy, 1997Heart rate varies with respiration, blood pressure, emotion, etc., and heart rate variability (HRV) is presently one of the best indices to predict fatal issues in cardiac failure and after myocardial infarction. HRV depends on various reflexes. In addition, parallel studies of HRV and the myocardial adrenergic and muscarinic transduction system in ...
B, Swynghedauw +11 more
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American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2003
the rhythm of the heart has not only fascinated cardiologists but also inspired poets and musicians. Indeed, the periodic beat of the heart was used to define the speed of music. In music notation, the traditional Italian term “moderato” originally referred to one beat of the measure per ...
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the rhythm of the heart has not only fascinated cardiologists but also inspired poets and musicians. Indeed, the periodic beat of the heart was used to define the speed of music. In music notation, the traditional Italian term “moderato” originally referred to one beat of the measure per ...
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Acupuncture and Heart Rate Variability
Acupuncture in Medicine, 2011The 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
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Variables Influencing Heart Rate
Progress in Cardiovascular Diseases, 2009In both physiologic and pathological conditions, instantaneous heart rate value is the result of a rather complex interplay. It constantly varies under the influence of a number of factors: nonmodifiable and modifiable ones. Pharmacologic blockade with beta-adrenergic antagonists and/or with parasympathetic antagonists such as atropine have permitted ...
Valentini, M, PARATI, GIANFRANCO
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Depression and heart rate variability
Biological Psychiatry, 1995Since there is evidence suggesting an increased incidence of cardiovascular morbidity in patients with major depression and phobic anxiety (Dalack et al 1990: Kawachi et al 1994), we have been conducting studies on cardiac autonomic function in these disorders using noninvasive techniques such as spectral analysis of heart rate (HR).
V K, Yeragani +3 more
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Heart Rate Variability and Swimming
Sports Medicine, 2014Professionals in the domain of swimming have a strong interest in implementing research methods in evaluating and improving training methods to maximize athletic performance and competitive outcome. Heart rate variability (HRV) has gained attention in research on sport and exercise to assess autonomic nervous system activity underlying physical ...
Julian, Koenig +4 more
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Heart rate variability: a review
Medical & Biological Engineering & Computing, 2006Heart rate variability (HRV) is a reliable reflection of the many physiological factors modulating the normal rhythm of the heart. In fact, they provide a powerful means of observing the interplay between the sympathetic and parasympathetic nervous systems.
U. Rajendra Acharya +4 more
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Heart rate variability in weightlifters
Human Physiology, 2009On 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 +2 more
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An Analysis of Heart Rate Variability
Ergonomics, 1973Proceeding 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
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