Results 171 to 180 of about 892,215 (229)

Analysis of Respiratory Sinus Arrhythmia with Respect to Respiratory Phase

open access: yesMethods 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   +3 more
exaly   +4 more sources

Respiratory sinus arrhythmia in the human fetus

open access: yesAmerican Journal of Obstetrics and Gynecology, 1985
This study explores the relationship between fetal heart rate variability and fetal breathing movements in the term fetus. Fourier analysis was applied to fetal heart rate variability during fetal breathing and nonbreathing episodes. A distinct component in the order of 0.7 to 0.95 Hz was demonstrated in fetal heart rate variability during breathing ...
Sze-Ya Yeh   +2 more
exaly   +5 more sources

Variation of respiratory sinus arrhythmia with age

open access: yesJournal of Applied Physiology, 1976
Respiratory sinus arrhythmia was measured on 24 male subjects whose agesranged from 21 to 65 yr, using a technique in which respiration was coupledto heart rate, so that there were 6 heartbeats per inspiration and 6 heartbeats per expiration. This voluntary cardiorespiratory coupling reduced the variance of heart rates measured at various points in ...
J B, Hellman, R W, Stacy
openaire   +3 more sources

Respiratory Sinus Arrhythmia in Blood Phobic Subjects

open access: yesPerceptual 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   +4 more
openaire   +4 more sources

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