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Titolo:
Analysis of heart rate variability with correlation dimension method in a normal population and in heart transplant patients
Autore:
Bogaert, C; Beckers, F; Ramaekers, D; Aubert, AE;
Indirizzi:
Katholieke Univ Leuven, Univ Hosp Gasthuisberg, Lab Expt Cardiol, Louvain,Belgium Katholieke Univ Leuven Louvain Belgium ab Expt Cardiol, Louvain,Belgium
Titolo Testata:
AUTONOMIC NEUROSCIENCE-BASIC & CLINICAL
fascicolo: 1-2, volume: 90, anno: 2001,
pagine: 142 - 147
SICI:
1566-0702(20010720)90:1-2<142:AOHRVW>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONLINEAR DYNAMICS;
Keywords:
heart rate variability; non-linear dynamics; chaos theory; correlation dimension; digital signal processing; heart transplants; circadian variations; gender differences;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Aubert, AE UZ Gasthuisberg ON, Dept Cardiol, Herestr 49, B-3000 Louvain, Belgium UZ Gasthuisberg ON Herestr 49 Louvain Belgium B-3000 , Belgium
Citazione:
C. Bogaert et al., "Analysis of heart rate variability with correlation dimension method in a normal population and in heart transplant patients", AUTON NEURO, 90(1-2), 2001, pp. 142-147

Abstract

Introduction: The correlation dimension (CD) method is related to chaos theory and is used to quantify heart rate variability (HRV). The CD is a measure for the amount of correlations present in the signal. Methods: The algorithm used to calculate the CD is based on the method of Grassberger and Proccacia. The method was first validated on signals with known CD and then applied to HRV-signals of heart transplants and an age-matched control groupof healthy subjects. The CD of the corresponding surrogate time series wascalculated to investigate non-linear correlations in the HRV-signal. Circadian variations of the CD were studied in 20 healthy subjects, including men and women. Results: The value of the CD for healthy subjects ranged from 2.12 to 5.53 with a mean value of 4.32. For heart transplants, only a few time series showed a finite value of the CD that varied between 2.10 and 5.60. Also, a significant difference was found between the CD of the original and the surrogate time series in healthy subjects. The CD of women is higher than the CD of men, and this difference was more pronounced during the night than during the day. Conclusions: This limited study shows that the CD alone cannot be used to make a distinction between HRV-signals of healthy subjects and of heart transplants. However, there is evidence that there arenon-linear correlations present in the HRV-signal and that there are significant gender and circadian differences in the CD. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 03:27:56