After cardiac denervation, a small-amplitude respiratory sinus arrhythmia (RSA) has been
described in animals and humans. Its mechanical and chemical determinants were …

Dogs differ greatly in size, heart (HR) and breathing rates (BR). In addition, they have a clear
Respiratory Sinus Arrhythmia (RSA) at rest. Therefore, better than any other mammalian …

We examined the hypothesis that respiratory sinus arrhythmia (RSA) is primarily a central
phenomenon and thus that RSA is directly correlated with respiratory controller output. RSA …

To test the hypothesis that hypoxia and hypercapnia have different effects on the genesis of
respiratory sinus arrhythmia (RSA), the magnitude of RSA to these stimuli was compared in …

This study examines respiratory sinus arrhythmia (RSA) in the isoflurane-anesthetized rat. In
fifteen female Sprague–Dawley rats, we recorded continuous ECG and respiratory airflow …

We performed this study to test whether the denervated human heart has the ability to
manifest respiratory sinus arrhythmia (RSA). With the use of a highly sensitive spectral …

Normally, at rest, the amplitude of respiratory sinus arrhythmia (RSA) appears to correlate
with cardiac vagal tone. However, recent studies showed that, under stress, RSA dissociates …

The aim of this study was to determine the mechanism (s) responsible for the persistence of
respiratory sinus arrhythmia (RSA) during central apnea. In five awake dogs, heart rate (HR) …

Respiratory sinus arrhythmia (RSA) is used as a noninvasive measure of vagal cardiac
input, but its causative mechanisms in humans remain undetermined. We compared the …

Respiratory sinus arrhythmia (RSA) may serve to enhance pulmonary gas exchange
efficiency by matching pulmonary blood flow with lung volume within each respiratory cycle …