Heart rate non linear dynamics in patients with persistent vegetative state: a preliminary report

Brain Injury : [BI]
Marco SaràAntonio Carolei

Abstract

This study evaluated the hypothesis that neural networks derangement in patients with a vegetative state (VS) may cause an alteration of heart rate (HR) non-linear pattern. Fifteen consecutive patients with a persistent VS and 15 matched healthy control subjects were included in the study. A 6-hour continuous electrocardiographic recording was used for the time series analysis measuring the occurrence time of the intervals between consecutive normal sinus heart beats (RR' intervals). Parameters evaluating linear and non-linear HR variability were studied. Approximate Entropy (ApEn), a non-linear parameter that quantifies the unpredictability of fluctuations in an instantaneous HR time series, was calculated from the average values of time series with fixed input variables. All linear parameters, with the only exception being the percentage of RR' intervals that were by at least 50 ms different from the previous interval (0.56, SD = 1.31 vs 10.35, SD = 12.58; p = 0.005) were similar in patients and in healthy control subjects. Mean ApEn values (0.68, SD = 0.24 vs 1.10, SD = 0.16; p = 0.0001) were lower in patients than in healthy control subjects. The findings support the hypothesis that derangement of neural networks may cause ...Continue Reading

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Citations

Oct 31, 2015·Brain Injury : [BI]·Francesca PistoiaGiuseppe Placidi
Aug 9, 2013·Brain Injury : [BI]·Francesca PistoiaAntonio Carolei
Mar 21, 2009·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Claudio BabiloniPaolo Maria Rossini
Nov 25, 2014·Current Pain and Headache Reports·Francesca PistoiaAntonio Carolei
Oct 22, 2014·Journal of Neurotrauma·Francesca PistoiaAntonio Carolei
Mar 24, 2009·Autonomic Neuroscience : Basic & Clinical·Michael F La FountaineRonald E De Meersman
Feb 7, 2013·Archives of Physical Medicine and Rehabilitation·Francesca PistoiaMarco Sarà
Jan 2, 2015·The Neurohospitalist·Francesca PistoiaAntonio Carolei
Jan 12, 2016·The Neurohospitalist·Rachele ZylbermanFrancesca Pistoia
Oct 1, 2013·Current Pain and Headache Reports·Francesca PistoiaAntonio Carolei
Jul 12, 2019·Frontiers in Neuroscience·Francesco RiganelloSteven Laureys
Mar 7, 2019·The American Journal of Occupational Therapy : Official Publication of the American Occupational Therapy Association·Ala'a F JaberJeff D Radel

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