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 …

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

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 …

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

To investigate the interindividual differences in respiratory sinus arrhythmia (RSA),
recordings of ventilation and electrocardiogram were obtained from 12 healthy subjects for …

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 degree of parasympathetic heart rate control, PC, was defined as the decrease in
average heart period (RR interval) caused by the elimination of parasympathetically …

A hypothesis is presented that explains the physiological reasons why the magnitude of
respiratory sinus arrhythmia (RSA) appears to correlate with cardiac vagal tone. The …

The effect of a variation in inspiration and expiration times on heart rate variability was
studied in 12 healthy subjects (mean age 30±6 years; five females). 2. Two 2 min trials of …

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 …