Results 181 to 190 of about 892,215 (229)

A Case-Based Classification of Respiratory Sinus Arrhythmia

, 2004
Respiratory Sinus Arrhythmia has until now been analysed manually by reviewing long time series of heart rate measurements. Patterns are identified in the analysis of the measurements. We propose a design for a classification system of Respiratory Sinus Arrhythmia by time series analysis of heart and respiration measurements.
Markus Nilsson, Peter Funk 0001
openaire   +3 more sources

Diminished respiratory sinus arrhythmia in asphyxiated term infants

American Journal of Obstetrics and Gynecology, 1986
Spectral analysis techniques were used to quantitate the association between respiration and heart rate variability in eight healthy and eight asphyxiated infants born at term gestation.
Sze-Ya Yeh, O Langer, Michael Y Divon
exaly   +2 more sources

Prediction of Tonic Parasympathetic Cardiac Control Using Respiratory Sinus Arrhythmia: The Need for Respiratory Control

Psychophysiology, 1991
Respiratory sinus arrhythmia (RSA) has received much attention in recent years due to the large body of evidence indicating that variations in this phenomenon represent alterations in parasympathetic cardiac control.
Wouter Wieling
exaly   +2 more sources

Respiratory Sinus Arrhythmia (RSA)

Respiratory sinus arrhythmia is part of the autonomic nervous system and serves to optimize gas exchange between the lungs and the circulatory system. It was measured through an electrocardiogram (ECG) and included respiratory sinus arrhythmia at rest ...
TRacking Adolescents' Individual Lives Survey
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A Minimal Model for the Respiratory Sinus Arrhythmia

Biological Cybernetics, 2006
The cardiac and respiratory rhythms in humans are known to be coupled by several mechanisms. In particular, the first rhythm is deeply modulated by the second. In this report we propose a simple operational model for heart rate variability which, taking such modulation into account, reproduces the main features of some experimental sequences of RR ...
Barbi M, Chillemi S, Di Garbo A, Balocchi R, Menicucci D   +4 more
openaire   +3 more sources

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

Model of respiratory sinus arrhythmia in man

Medical & Biological Engineering & Computing, 1989
The first section of the model delineates the parasympathetic signal as a function of the interaction between the respiratory and the vagal neurones of the common brainstem network. The second section is a version of Chess and Calaresu's description of the vagus/heart period system in the sympathetically blocked cat.
R M, Negoescu, I E, Csiki
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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
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Respiratory Sinus Arrhythmia of Brainstem Lesions

Journal of Child Neurology, 1999
In this pilot study we investigated the hypothesis that intrinsic and extrinsic brainstem lesions situated within the pontomedullary region would effect the integrity of respiratory sinus arrhythmia. The study sample consisted of three patients with anatomic brainstem abnormalities associated with isolated Chiari I malformation, Chiari II malformation ...
F J, DiMario, L, Bauer, D, Baxter
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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