1. The influence of central inspiratory drive on heart rate variability was investigated in
young human subjects using power spectral analysis of RR intervals. 2. The area of the high …

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 …

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 relationship of respiratory sinus arrhythmia (RSA) to the accompanying oscillations of
cardiovascular pressures has been studied in five healthy subjects. Tidal volumes (VT) of …

Research on respiratory sinus arrhythmia, or high-frequency heart rate variability (its
frequency-domain equivalent), has been popular in psychology and the behavioral sciences …

Respiratory sinus arrhythmia (RSA) is a commonly employed non-invasive measure of
cardiac vagal control. It has been demonstrated that respiratory parameters such as tidal …

Our aim was to model the dependence of respiratory sinus arrhythmia (RSA) on the
respiratory waveform and to elucidate underlying mechanisms of cardiorespiratory coupling …

Respiratory sinus arrhythmia (RSA) is a popular index of cardiac vagal control; however,
research has rarely adequately addressed respiratory influences on RSA. In addition …

Previous studies have found that respiratory variations of ventricular response in atrial
fibrillation are infrequent and inconsistent. This asynchrony between heart rate and …

The high-frequency (HF) component of the heart rate variability (HRV) is regarded as an
index of cardiac vagal responsiveness. However, when vagal tone is decreased, nonneural …