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Titolo:
CIRCADIAN ASPECTS OF APPARENT CORRELATION DIMENSION IN HUMAN HEART-RATE DYNAMICS
Autore:
VANLEEUWEN P; BETTERMANN H; HEIDEN UAD; KUMMELL HC;
Indirizzi:
ENTWICKLUNGS & FORSCHUNGSZENTRUM MIKROTHERAPIE,RES & DEV CTR MICROTHERAPY,UNIV STR 142 D-44799 BOCHUM GERMANY GEMEINSCHAFTSKRANKENHAUS HERDECKE,DEPT CLIN RES D-58313 HARDECKE GERMANY UNIV WITTEN HERDECKE,CTR NONLINEAR DYNAM D-58453 WITTEN GERMANY
Titolo Testata:
American journal of physiology. Heart and circulatory physiology
fascicolo: 1, volume: 38, anno: 1995,
pagine: 130 - 134
SICI:
0363-6135(1995)38:1<130:CAOACD>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
RATE-VARIABILITY; APPROXIMATE ENTROPY; COMPLEXITY; RHYTHM; OSCILLATIONS; CHAOS;
Keywords:
NONLINEAR DYNAMICS; COMPLEXITY; DIURNAL RHYTHM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
P. Vanleeuwen et al., "CIRCADIAN ASPECTS OF APPARENT CORRELATION DIMENSION IN HUMAN HEART-RATE DYNAMICS", American journal of physiology. Heart and circulatory physiology, 38(1), 1995, pp. 130-134

Abstract

The purpose of this study was to examine changes in complexity of cardiac dynamics over 24 h. With use of Holter monitoring, 27 24-h electrocardiogram recordings were obtained from 15 healthy subjects. For each recording, the apparent dimension (D-A) was calculated for consecutive sections of 500 heartbeats. These were used to determine nighttime and daytime dimension (D-A) and D-Ad, respectively) as well as the difference between D-An and D-Ad (Delta D-A). Mean 24-h D-A, D-An, and D-Ad were 5.9 +/- 0.3, 6.3 +/- 0.5, and 5.6 +/- 0.6, respectively. D-Ac was significantly higher than D-Ad (P < 0.001), with a mean Delta D-A of 0.6 +/- 0.7. Furthermore, 67% of Delta D-A values were significantly different from zero at the 0.05 level. The results show that dimension analysis may be applied to heart rate dynamics to reveal circadian differences of heart rate complexity. We suggest that the decreased complexity during daytime may result from the synchronization of physiological functions. The increase in complexity at night would then correspond to an uncoupling of these functions during the regenerative period.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 16:19:43