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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/40748
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dc.contributor.authorTakahashi, Anielle C. M.-
dc.contributor.authorPorta, Alberto-
dc.contributor.authorMelo, Ruth C.-
dc.contributor.authorQuiterio, Robison J.-
dc.contributor.authorda Silva, Ester-
dc.contributor.authorBorghi-Silva, Audrey-
dc.contributor.authorTobaldini, Eleonora-
dc.contributor.authorMontano, Nicola-
dc.contributor.authorCatai, Aparecida M.-
dc.date.accessioned2014-05-20T15:31:41Z-
dc.date.accessioned2016-10-25T18:07:36Z-
dc.date.available2014-05-20T15:31:41Z-
dc.date.available2016-10-25T18:07:36Z-
dc.date.issued2012-06-01-
dc.identifierhttp://dx.doi.org/10.1007/s11739-011-0512-z-
dc.identifier.citationInternal and Emergency Medicine. New York: Springer, v. 7, n. 3, p. 229-235, 2012.-
dc.identifier.issn1828-0447-
dc.identifier.urihttp://hdl.handle.net/11449/40748-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/40748-
dc.description.abstractIncreasing age is associated with a reduction in overall heart rate variability as well as changes in complexity of physiologic dynamics. The aim of this study was to verify if the alterations in autonomic modulation of heart rate caused by the aging process could be detected by Shannon entropy (SE), conditional entropy (CE) and symbolic analysis (SA). Complexity analysis was carried out in 44 healthy subjects divided into two groups: old (n = 23, 63 +/- A 3 years) and young group (n = 21, 23 +/- A 2). It was analyzed SE, CE [complexity index (CI) and normalized CI (NCI)] and SA (0V, 1V, 2LV and 2ULV patterns) during short heart period series (200 cardiac beats) derived from ECG recordings during 15 min of rest in a supine position. The sequences characterized by three heart periods with no significant variations (0V), and that with two significant unlike variations (2ULV) reflect changes in sympathetic and vagal modulation, respectively. The unpaired t test (or Mann-Whitney rank sum test when appropriate) was used in the statistical analysis. In the aging process, the distributions of patterns (SE) remain similar to young subjects. However, the regularity is significantly different; the patterns are more repetitive in the old group (a decrease of CI and NCI). The amounts of pattern types are different: 0V is increased and 2LV and 2ULV are reduced in the old group. These differences indicate marked change of autonomic regulation. The CE and SA are feasible techniques to detect alteration in autonomic control of heart rate in the old group.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.format.extent229-235-
dc.language.isoeng-
dc.publisherSpringer-
dc.sourceWeb of Science-
dc.subjectAgingen
dc.subjectHeart rate variabilityen
dc.subjectNonlinear analysisen
dc.subjectConditional entropyen
dc.subjectSymbolic analysisen
dc.titleAging reduces complexity of heart rate variability assessed by conditional entropy and symbolic analysisen
dc.typeoutro-
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.contributor.institutionUniv Milan-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniv Metodista Piracicaba-
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Cardiovasc Physiotherapy Lab, Physiotherapy Dept, BR-13565905 São Paulo, Brazil-
dc.description.affiliationUniv Milan, Dept Technol Hlth, Galeazzi Orthopaed Inst, Milan, Italy-
dc.description.affiliationUniv São Paulo, Sch Arts Sci & Humanities, São Paulo, Brazil-
dc.description.affiliationUNESP Univ Estadual Paulista, São Paulo, Brazil-
dc.description.affiliationUniv Metodista Piracicaba, Fac Hlth Sci, São Paulo, Brazil-
dc.description.affiliationUniv Milan, Dept Clin Sci, L Sacco Hosp, Milan, Italy-
dc.description.affiliationUnespUNESP Univ Estadual Paulista, São Paulo, Brazil-
dc.description.sponsorshipIdFAPESP: 06/52860-0-
dc.description.sponsorshipIdFAPESP: 05/54838-9-
dc.description.sponsorshipIdCAPES: PDEE/1228/08-0-
dc.description.sponsorshipIdPRIN 2007-
dc.identifier.doi10.1007/s11739-011-0512-z-
dc.identifier.wosWOS:000305131100006-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofInternal and Emergency Medicine-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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