Impaired autonomic vascular control: A non linear dynamic analysis

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The specific role of autonomic vascular control in determining non-linear behaviour of RR intervals is not clear. In 10 T12-L4 paraplegic subjects (light vascular autonomic impairment), 12 T 5-T11 paraplegic subjects (moderate vascular autonomic impairment), and 24 controls RR time series were recorded (10 min): 1) in resting supine position; 2) sitting on the wheelchair and 3) during a light (5W) arm exercise. Fractal Dimension (FD), Approximate Entropy (ApEn) and the a scaling exponent (α-DFA, Detrended Fluctuation Analysis) were calculated. The lesional level significantly affected ApEn (p=0.004), FD (p=0.007) and α-DFA (p=0.002). Autonomic activation did not influence FD and α-DFA, but significantly affected ApEn (p=0.03S). It seems that FD and α-DFA are influenced by the changes in nonlinear RR dynamics due to vascular autonomic impairment but not to autonomic activation, whereas ApEn may be equally responsive to either condition.

Original languageEnglish
Title of host publicationComputers in Cardiology
EditorsA. Murray
Number of pages4
Publication statusPublished - 2003
EventComputers in Cardiology 2003 - Thessaloniki Chalkidiki, Greece
Duration: Sep 21 2003Sep 24 2003


OtherComputers in Cardiology 2003
CityThessaloniki Chalkidiki

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Software


Dive into the research topics of 'Impaired autonomic vascular control: A non linear dynamic analysis'. Together they form a unique fingerprint.

Cite this