Heart rate variability under resting conditions in postmenopausal and young women

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Autor(es): dc.creatorMarães, Vera Regina Fernandes Silva-
Autor(es): dc.creatorAzevedo, George Dantas de-
Autor(es): dc.creatorCrescêncio, Júlio César-
Autor(es): dc.creatorRibeiro, Tatiane Flores-
Autor(es): dc.creatorPapa, Valeria-
Autor(es): dc.creatorCatai, Aparecida Maria-
Autor(es): dc.creatorVerzola, Roberto Mário Machado-
Autor(es): dc.creatorOliveira, Lucien de-
Autor(es): dc.creatorSá, Marcos Felipe Silva de-
Autor(es): dc.creatorGallo Júnior, Lourenço-
Autor(es): dc.creatorSilva, Ester da-
Data de aceite: dc.date.accessioned2024-10-23T16:33:56Z-
Data de disponibilização: dc.date.available2024-10-23T16:33:56Z-
Data de envio: dc.date.issued2012-12-03-
Data de envio: dc.date.issued2012-12-03-
Data de envio: dc.date.issued2001-07-
Fonte completa do material: dc.identifierhttp://repositorio.unb.br/handle/10482/11735-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/S0100-879X2001000700006-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/911592-
Descrição: dc.descriptionThe aim of the present study was to compare the modulation of heart rate in a group of postmenopausal women to that of a group of young women under resting conditions on the basis of R-R interval variability. Ten healthy postmenopausal women (mean ± SD, 58.3 ± 6.8 years) and 10 healthy young women (mean ± SD, 21.6 ± 0.82 years) were submitted to a control resting electrocardiogram (ECG) in the supine and sitting positions over a period of 6 min. The ECG was obtained from a one-channel heart monitor at the CM5 lead and processed and stored using an analog to digital converter connected to a microcomputer. R-R intervals were calculated on a beat-to-beat basis from the ECG recording in real time using a signal-processing software. Heart rate variability (HRV) was expressed as standard deviation (RMSM) and mean square root (RMSSD). In the supine position, the postmenopausal group showed significantly lower (P<0.05) median values of RMSM (34.9) and RMSSD (22.32) than the young group (RMSM: 62.11 and RMSSD: 49.1). The same occurred in the sitting position (RMSM: 33.0 and RMSSD: 18.9 compared to RMSM: 57.6 and RMSSD: 42.8 for the young group). These results indicate a decrease in parasympathetic modulation in postmenopausal women compared to young women which was possibly due both to the influence of age and hormonal factors. Thus, time domain HRV proved to be a noninvasive and sensitive method for the identification of changes in autonomic modulation of the sinus node in postmenopausal women.-
Formato: dc.formatapplication/pdf-
Publicador: dc.publisherAssociação Brasileira de Divulgação Científica-
Direitos: dc.rightsAcesso Aberto-
Direitos: dc.rightsBrazilian Journal of Medical and Biological Research - Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons (Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)). Fonte: http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-879X&lng=pt&nrm=iso. Acesso em: 7 nov. 2012.-
Palavras-chave: dc.subjectBatimento cardíaco-
Palavras-chave: dc.subjectMenopausa-
Palavras-chave: dc.subjectCoração - doenças-
Palavras-chave: dc.subjectExercícios físicos-
Título: dc.titleHeart rate variability under resting conditions in postmenopausal and young women-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional – UNB

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