... in a dynamic setting. We investigated the impact of different breathing patterns on short-term HRV measurements during experimental endotoxaemia. Furthermore, we assessed whether paced breathing improved HRV reproducibility. Twelve healthy male volunteers received an intravenous bolus (2 ng/kg of body weight...

... fraction), 46±6%; values are means±S.D.], who underwent a 5+5 min ECG recording during spontaneous and paced breathing on two consecutive days. Standard time-domain [SDNN (S.D. of RR interval values) and RMSSD (root-mean-square of successive RR interval differences)] and frequency-domain [LF (low-frequency...

... ECG heart rate variability high-frequency power low-frequency power paced breathing RR interval Scientific publications utilizing HRV (heart rate variability) as an index of cardiac autonomic modulation are increasing year on year [ 1 ]. It would therefore seem logical to conclude...

... parameters the ICC was >0.8 (range 0.65–0.88). The estimated sample size ranged from 24–98 subjects. Reliability indexes tended to improve during paced breathing. We conclude that short-term HRV parameters are subject to large day-to-day random variations. Random error, however, represents a limited part...

... © 2004 The Biochemical Society 2004 cerebral autoregulation controlled respiration paced breathing transcranial Doppler ultrasound transfer function analysis Clinical Science (2004) 106, 155 162 (Printed in Great Britain) 155 Influence of controlled breathing patterns on cerebrovascular...