Background Programming a mechanical ventilator with a biologically variable or fractal
breathing pattern (an example of 1/f noise) improves gas exchange and respiratory …

Abstract This Committee Report provides methodological, interpretive, and reporting
guidance for researchers who use measures of heart rate (HR) and heart rate variability …

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 …

Pulse rate variability is a physiological parameter that has been extensively studied and
correlated with many physical ailments. However, the phase relationship between inter-beat …

Abstract William Bayliss and Ernest Starling are not only famous as pioneers in
cardiovascular physiology, but also responsible for the discovery of the first hormone (from …

The precise contribution of the CO2-dependent respiratory rhythm to sinus arrhythmia in
eupnea is unclear. The respiratory rhythm and sinus arrhythmia were measured in 12 …

Sympathetic nerve activity (SNA) is tightly coupled with the respiratory cycle. In healthy
human males, respiratory modulation of SNA does not change with age. However, it is …

The aim of this study was to test our hypothesis that both phasic cardiac vagal activity and
tonic pulmonary vagal activity, estimated as respiratory sinus arrhythmia (RSA) and …

It is known that a mental attention task (MAT) can modify the magnitude of the increase in
instantaneous heart rate (HR) with inspiration, or Respiratory Sinus Arrhythmia (RSA). Here …

Functional gastrointestinal disorders, ie, abdominal conditions without identifiable structural
etiologies, are seen frequently in primary care and specialty practices. As subtle …