Heart rate variability complexity in the aging process

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

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

Revista

Título: Computational and Mathematical Methods in Medicine

Vol. 8 Nº 4

Páginas: 287-296

ISSN: 1748-670X

Editora: Hindawi

Indexação

ISI Web of Knowledge

Scopus - 7 Citações

Pubmed / Medline

Classificação Científica

CORDIS: Ciências da Saúde

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica