Results 201 to 210 of about 33,582 (248)

Individual differences in respiratory sinus arrhythmia

American Journal of Physiology-Heart and Circulatory Physiology, 2004
To investigate the interindividual differences in respiratory sinus arrhythmia (RSA), recordings of ventilation and electrocardiogram were obtained from 12 healthy subjects for five imposed breathing periods ( TTOT) surrounding each individual's spontaneous breathing period.
Samia, Ben Lamine, Pascale, Calabrese, Hélène, Perrault, Tuan Pham, Dinh, André, Eberhard, Gila, Benchetrit   +5 more
openaire   +2 more sources

Self-regulation of respiratory sinus arrhythmia

Biofeedback and Self-Regulation, 1992
Respiratory sinus arrhythmia (RSA)--the peak-to-peak variations in heart rate caused by respiration--can be used as a noninvasive measure of parasympathetic cardiac control. In the present study four strategies to increase RSA amplitude are investigated: (1) biofeedback of RSA amplitude, (2) biofeedback of RSA amplitude plus respiratory instructions ...
G A, Reyes del Paso, J, Godoy, J, Vila
openaire   +2 more sources

Respiratory Sinus Arrhythmia and Chaos

2008 2nd International Conference on Bioinformatics and Biomedical Engineering, 2008
To investigate the chaotic characteristic of respiratory sinus arrhythmia and nonlinearity in heart rate variability (HRV), two kinds of voluntary breathing, namely, paced breathing and breath-holding, were compared with spontaneous breathing. High frequency component (HF) and its band width of HRV were changed according to respiratory patterns ...
J.-T. Sun, Y. Fang, Cheng Li, Guo-Qiang Wu, Chi-Sang Poon   +4 more
openaire   +1 more source

Respiratory Sinus Arrhythmia in Blood Phobic Subjects

Perceptual and Motor Skills, 1997
12 blood-phobic subjects, selected according to the Feat Survey Schedule and the Mutilation Questionnaire, and 50 control subjects performed a paced respiration task during which heart rate and respiration were recorded. Respiratory Sinus Arrhythmia (RSA) was analyzed as an autonomic index of vagal influence on the heart.
ANGRILLI, ALESSANDRO, SARLO, MICHELA, PALOMBA, DANIELA, SCHINCAGLIA M., STEGAGNO, LUCIANO   +4 more
openaire   +3 more sources

Respiratory Sinus Arrhythmia and Central Respiratory Drive in Humans

Clinical Science, 1996
1. The influence of central inspiratory drive on heart rate variability was investigated in young human subjects using power spectral analysis of R—R intervals. 2. The area of the high-frequency component occurring at the respiratory frequency (0.2–0.25 Hz) in the power spectral density curves was used as an index of respiratory sinus ...
M, Al-Ani, A S, Forkins, J N, Townend, J H, Coote   +3 more
openaire   +2 more sources

Respiratory Sinus Arrhythmia and Cardiovascular Responses to Stress

Psychophysiology, 1992
ABSTRACTThe parasympathetic nervous system provides mechanisms that could attenuate sympathetically mediated heart rate stress responses and might have even more general antagonistic actions on stress reactivity. Individuals characterized by higher levels of parasympathetic tone might, through such mechanisms, be less reactive when stimuli elicit ...
J D, Lane, R A, Adcock, R E, Burnett
openaire   +2 more sources

Analysis of Respiratory Sinus Arrhythmia with Respect to Respiratory Phase

Methods of Information in Medicine, 2000
Abstract:We evaluated the respiratory modulation of heart rate, i.e., respiratory sinus arrhythmia (RSA), with respect to respiratory phase derived from an analytic signal from the lung volume curve, during spontaneous breathing and paced breathing with different patterns.
K, Kotani, I, Hidaka, Y, Yamamoto, S, Ozono   +3 more
exaly   +3 more sources

The Respiratory Sinus Arrhythmia: A Measure of Cardiac Age

Science, 1984
A method developed for quantifying respiratory sinus arrhythmia (RSA) during voluntary cardiorespiratory synchronization relies on computer-assisted rhythmometric cosinor analysis of instantaneous heart rate data. The RSA was present in all subjects tested, even those at advanced ages. The amplitude of the RSA falls approximately 10 percent per decade.
W J, Hrushesky, D, Fader, O, Schmitt, V, Gilbertsen   +3 more
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Respiratory sinus arrhythmia and cognitive functioning in children

Developmental Psychobiology, 2008
AbstractWe examined associations between children's cognitive performance and both basal respiratory sinus arrhythmia (RSA) and RSA regulation to a reaction time task. Cognitive performance was examined in the lab via standardized tests of cognitive functioning (Woodcock–Johnson III) and a reaction time task.
Lori, Staton, Mona, El-Sheikh, Joseph A, Buckhalt   +2 more
openaire   +2 more sources

Modulation of Respiratory Sinus Arrhythmia by Breathing Pattern

Clinical Science, 1996
Respiratory sinus arrhythmia (RSA) of healthy humans is dependent on multiple factors like heart rate itself, blood pressure, stroke volume and sympatho-vagal tone. Respiration is a dominant factor causing an extended variability of heart rate, and is frequently used for testing the status of autonomic nervous system [I].
C, Haggenmiller, J H, Baumert, M, Adt, A W, Frey   +3 more
openaire   +2 more sources