Linear and nonlinear analysis of heart rate variability in healthy subjects and after acute myocardial infarction in patients

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dc.contributor.authorKunz, Vandeni Clarice
dc.contributor.authorBorges, Érica Nicolau
dc.contributor.authorCoelho, Regina Célia [UNIFESP]
dc.contributor.authorGubolino, Luiz Antonio
dc.contributor.authorMartins, Luiz Eduardo Barreto
dc.contributor.authorSilva, Ester da
dc.contributor.institutionUniversidade Federal de São Carlos Departamento de Fisioterapia Núcleo de Pesquisa em Exercício Físico
dc.contributor.institutionUniversidade Metodista de Piracicaba Faculdade de Ciências da Saúde
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUnidade Coronariana do Hospital dos Fornecedores de Cana de Piracicaba
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2015-06-14T13:43:44Z
dc.date.available2015-06-14T13:43:44Z
dc.date.issued2012-05-01
dc.description.abstractThe objectives of this study were to evaluate and compare the use of linear and nonlinear methods for analysis of heart rate variability (HRV) in healthy subjects and in patients after acute myocardial infarction (AMI). Heart rate (HR) was recorded for 15 min in the supine position in 10 patients with AMI taking β-blockers (aged 57 ± 9 years) and in 11 healthy subjects (aged 53 ± 4 years). HRV was analyzed in the time domain (RMSSD and RMSM), the frequency domain using low- and high-frequency bands in normalized units (nu; LFnu and HFnu) and the LF/HF ratio and approximate entropy (ApEn) were determined. There was a correlation (P < 0.05) of RMSSD, RMSM, LFnu, HFnu, and the LF/HF ratio index with the ApEn of the AMI group on the 2nd (r = 0.87, 0.65, 0.72, 0.72, and 0.64) and 7th day (r = 0.88, 0.70, 0.69, 0.69, and 0.87) and of the healthy group (r = 0.63, 0.71, 0.63, 0.63, and 0.74), respectively. The median HRV indexes of the AMI group on the 2nd and 7th day differed from the healthy group (P < 0.05): RMSSD = 10.37, 19.95, 24.81; RMSM = 23.47, 31.96, 43.79; LFnu = 0.79, 0.79, 0.62; HFnu = 0.20, 0.20, 0.37; LF/HF ratio = 3.87, 3.94, 1.65; ApEn = 1.01, 1.24, 1.31, respectively. There was agreement between the methods, suggesting that these have the same power to evaluate autonomic modulation of HR in both AMI patients and healthy subjects. AMI contributed to a reduction in cardiac signal irregularity, higher sympathetic modulation and lower vagal modulation.en
dc.description.affiliationUniversidade Federal de São Carlos Departamento de Fisioterapia Núcleo de Pesquisa em Exercício Físico
dc.description.affiliationUniversidade Metodista de Piracicaba Faculdade de Ciências da Saúde
dc.description.affiliationUniversidade Federal de São Paulo (UNIFESP) Instituto de Ciência e Tecnologia
dc.description.affiliationUnidade Coronariana do Hospital dos Fornecedores de Cana de Piracicaba
dc.description.affiliationUniversidade Estadual de Campinas Faculdade de Educação Física
dc.description.affiliationUnifespUNIFESP, Instituto de Ciência e Tecnologia
dc.description.sourceSciELO
dc.format.extent450-458
dc.identifierhttps://dx.doi.org/10.1590/S0100-879X2012007500025
dc.identifier.citationBrazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 45, n. 5, p. 450-458, 2012.
dc.identifier.doi10.1590/S0100-879X2012007500025
dc.identifier.fileS0100-879X2012000500011.pdf
dc.identifier.issn0100-879X
dc.identifier.scieloS0100-879X2012000500011
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/7092
dc.identifier.wosWOS:000303940200011
dc.language.isoeng
dc.publisherAssociação Brasileira de Divulgação Científica
dc.relation.ispartofBrazilian Journal of Medical and Biological Research
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectMyocardial infarctionen
dc.subjectHeart rate variabilityen
dc.subjectAutonomic nervous systemen
dc.subjectSpectral analysisen
dc.subjectNonlinear dynamicsen
dc.titleLinear and nonlinear analysis of heart rate variability in healthy subjects and after acute myocardial infarction in patientsen
dc.typeinfo:eu-repo/semantics/article
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