Comparação entre métodos de avaliação da modulação vagal cardíaca

Paiva, Vagner Clayton de; Santana, Kelen Rabelo; Silva, Bruno M.; Ramos, Plínio dos Santos; Lovisi, Júlio César Moraes; Araújo, Cláudio Gil Soares de; Ricardo, Djalma Rabelo

doi:10.1590/s0066-782x2011005000109

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…In the present study, cardiac parasympathetic activity was found to have increased after surgery, a finding that might be due to the fact that the 4sET is a test that is reliable 16 and has been validated 18 for assessment of CVA by means of the CVI, a dimensionless index that reflects vagal withdrawal induced by rapid exercise. Assessment of HRV is used in most such studies; although HRV assessment is widely used in order to assess cardiac autonomic modulation, it has low reproducibility 17 25 - 27 Given that our study focused on assessing the cardiac parasympathetic nervous system, HRV assessment 28 was not used.…”

Section: Discussionmentioning

confidence: 99%

Longitudinal follow-up of cardiac vagal activity in individuals undergoing endoscopic thoracic sympathectomy

et al. 2018

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Objective: To conduct a longitudinal investigation of cardiac vagal activity (CVA) by measuring resting HR and calculating the cardiac vagal index (CVI) in individuals undergoing sympathectomy for the treatment of primary hyperhidrosis. Methods: This was a descriptive longitudinal study involving 22 patients, 13 of whom were female. The mean age was 22.5 ± 8.8 years. The palms, soles, and axillae were the most commonly affected sites. Resting HR was measured by an electrocardiogram performed 20 min before the 4-second exercise test (4sET), which was used in order to evaluate CVA at three different time points: before surgery, one month after surgery, and four years after surgery. Results: Resting HR (expressed as mean ± SE) was found to have decreased significantly at 1 month after surgery (73.1 ± 1.6 bpm before surgery vs. 69.7 ± 1.2 bpm at one month after surgery; p = 0.01). However, the HR values obtained at four years after surgery tended to be similar to those obtained before surgery (p = 0.31). The CVI (expressed as mean ± SE) was found to have increased significantly at one month after surgery (1.44 ± 0.04 before surgery vs. 1.53 ± 0.03 at one month after surgery; p = 0.02). However, the CVI obtained at four years after surgery tended to be similar to that obtained before surgery (p = 0.10). Conclusions: At one month after sympathectomy for primary hyperhidrosis, patients present with changes in resting HR and CVA, both of which tend to return to baseline at four years after surgery.

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Section: Discussionmentioning

confidence: 99%

Longitudinal follow-up of cardiac vagal activity in individuals undergoing endoscopic thoracic sympathectomy

et al. 2018

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“…A obtenção dos índices da VFC é de extrema importância para a compreensão clínica acerca de determinadas variáveis fisiológicas, pois aumentos na variabilidade indicam boa adaptação fisiológica do organismo e de sua manutenção pressupondo uma condição de estabilidade do sistema biológico ao passo que reduções têm sido apontadas como preditores de doenças ou do aparecimento de eventos adversos em pacientes com doençasjá conhecidas 1,11 . São utilizados tambémpara melhor compreensão darelação de certas doenças e a modulação autonômica.…”

Section: Aplicabilidade Clínica Da Vfcunclassified

Aplicabilidade Clínica da Variabilidade da Frequência Cardíaca

Lopes

Oliveira

André

et al. 2014

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Rev Neurocienc 2013;21(4):600-603 revisão 600 RESUMOObjetivo. O objetivo deste trabalho foi revisar aspectos conceituais da Variabilidade da Frequência Cardíaca (VFC), seus dispositivos de mensuração, índices utilizados para sua análise e utilização clínica. Método. Uma revisão de literatura não sistemática realizada através de busca eletrônica conduzidas nas seguintes bases de dados: Medline/ PubMed, Lilacs, Ovid, Science Direct e Biomed Central acerca da utilização clínica da VFC. Resultados. A VFC compreende as oscilações entre os intervalos RR que refletem as modificações na frequência cardíaca em função da atuação conjunta das divisões simpática e parassimpática do sistema nervoso autônomo. Sua análise pode ser executada em função de dois parâmetros: domínio de tempo e domínio de frequência. O eletrocardiograma, conversores analógicos e cardiofrequencímetros são os principais instrumentos utilizados para obtenção de seus índices, onde a alta variabilidade indica boa adaptação fisiológica do organismo, enquanto que sua redução tem sido apontada como importante indicador para o surgimento de patologias ou de complicações em pacientes com doenças de base conhecidas. Conclusâo. O estudo da VFCvem se apresentando como importante ferramenta de avaliação do funcionamento do organismo em condições normais e patológicas proporcionando assim o desenvolvimento de ações pelos profissionais da saúde visando prevenção e/ou detecção de várias fisiopatologias.Unitermos. Frequência Cardíaca, Adaptação Fisiológica, Sistema Nervoso Autônomo.Citação. Lopes PFF, Oliveira MIB, Sousa AndréSM, Nascimento DLA, Silva CSS, Rebouças GM, Renee Felipe T, Albuquerque Filho NJB, Medeiros HJ. Aplicabilidade Clínica da Variabilidade da Frequência Cardíaca. ABSTRACTObjective. The purpose of this study was to review the conceptual aspects of Heart Rate Variability (HRV), its measurement devices, indexes used for analysis and clinical use. Method. A non-systematic literature review conducted through electronic search conducted in the following databases: Medline/PubMed, Lilacs, Ovid, Science Direct and BioMed Central about the clinical use of HRV. Results. HRV comprises oscillations between RR intervals that reflect the changes in heart rate due to the joint action of the sympathetic and parasympathetic divisions of the autonomic nervous system. The HRV's analysis can be performed by the basis of two parameters: the time domain and frequency domain. The electrocardiogram, heart monitors and analog converters are the main instruments used to obtain indices that allow the assessment of HRV, whose high variability indicates good physiological adaptation of the organism while its reduction has been identified as an important indicator for the emergence of pathologies or complications in patients with underlying diseases known. Conclusion. The study of HRV has been presented as an important tool for assessing the body functioning in normal and pathological conditions thus providing the development of actions by health professionals aiming preventio...

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“…5 In the last few years, non-invasive methods such as power spectral analysis of the HRV have been used to evaluate cardiac risk in a variety of conditions, including cardiac disorders, stroke, and diabetes. 6,7 In the present study, we tested the hypothesis that power spectral analysis of the HRV coupled with postural stress would enable the detection of early changes in sympathovagal balance not diagnosed by traditional analysis of the HRV.…”

Section: Introductionmentioning

confidence: 99%