Abstract
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 language | English |
|---|---|
| Title of host publication | Computers in Cardiology |
| Editors | A. Murray |
| Pages | 713-716 |
| Number of pages | 4 |
| Volume | 30 |
| Publication status | Published - 2003 |
| Event | Computers in Cardiology 2003 - Thessaloniki Chalkidiki, Greece Duration: Sep 21 2003 → Sep 24 2003 |
Other
| Other | Computers in Cardiology 2003 |
|---|---|
| Country | Greece |
| City | Thessaloniki Chalkidiki |
| Period | 9/21/03 → 9/24/03 |
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ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
- Software
Cite this
Impaired autonomic vascular control : A non linear dynamic analysis. / Merati, Giampiero; Di Rienzo, M.; Veicsteinas, A.; Castiglioni, P.
Computers in Cardiology. ed. / A. Murray. Vol. 30 2003. p. 713-716.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Impaired autonomic vascular control
T2 - A non linear dynamic analysis
AU - Merati, Giampiero
AU - Di Rienzo, M.
AU - Veicsteinas, A.
AU - Castiglioni, P.
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
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M3 - Conference contribution
VL - 30
SP - 713
EP - 716
BT - Computers in Cardiology
A2 - Murray, A.
ER -