Heart rate variability complexity in the aging process

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Tejera, E (Author) Other; Plain, A (Author) Other; Portelinha, A (Author) Other; Caceres, JLH (Author) Other; Rebelo, I (Author) FFUP; Nieto Villar, JM (Author) Other

Journal

Title: Computational and Mathematical Methods in Medicine

Vol. 8 No. 4

Pages: 287-296

ISSN: 1748-670X

Publisher: Hindawi

Indexing

ISI Web of Knowledge

Scopus - 7 Citations

Pubmed / Medline

Scientific classification

CORDIS: Health sciences

Other information

Authenticus ID: P-007-JXH

DOI: 10.1080/17486700701776413

Resumo (PT): In the present work, we propose a discrete model to the characterization of heart rate variability (HRV) complexity in the aging process of healthy subjects.We apply the Shannon entropy on the basis of an alternative way to probability calculation and to define a new index taking into consideration the transition probability that is related to the physiological complexity of the system. Our results suggest that in the aging process the capability response decreases according to the reduction of the physiological complexity. In the oldest group, an alternative mechanism emerges to compensate for this lack of capability; however, this effect does not increase the physiological complexity. Concomitantly, we provide some physiological explanation for our results. <br> <br> Keywords: Probability; Physiological complexity; Aging process; Capability response; HRV <br> <a target="_blank" href="http://web.ebscohost.com/ehost/detail?vid=3&hid=6&sid=3886cee2-91ae-4fb9-8331-2a7e37bcdfa7%40sessionmgr109&bdata=JnNpdGU9ZWhvc3QtbGl2ZSZzY29wZT1zaXRl#db=a2h&AN=27665476"> Texto integral</a> <br> <br>

Abstract (EN): In the present work, we propose a discrete model to the characterization of heart rate variability (HRV) complexity in the aging process of healthy subjects. We apply the Shannon entropy on the basis of an alternative way to probability calculation and to define a new index taking into consideration the transition probability that is related to the physiological complexity of the system. Our results suggest that in the aging process the capability response decreases according to the reduction of the physiological complexity. In the oldest group, an alternative mechanism emerges to compensate for this lack of capability; however, this effect does not increase the physiological complexity. Concomitantly, we provide some physiological explanation for our results.

Language: English

Type (Professor's evaluation): Scientific