Global Chaotic Parameters of Heart Rate Variability During Mental Task

• Autor(a) principal: Fontes, Anne M. G. [UNESP]
• Data de Publicação: 2016
• Outros Autores: Garner, David M., De Abreu, Luiz Carlos, Barbosa, Juliana C. [UNESP], De Assis, Elisangela Vilar, De Souza, Ana Cecilia A., Porto, Andrey A. [UNESP], Valenti, Vitor E. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1002/cplx.21656; http://hdl.handle.net/11449/158975
• topic: cardiovascular system; autonomic nervous system; mental stimulation; chaos

We aimed to evaluate the novel chaotic global techniques of heart rate variability (HRV) analysis during a specific autonomic test, the mental arithmetic overload test. These are spectral detrended fluctuation analysis and spectral multi-taper method; in addition to spectral entropy. We analyzed 24 healthy male students-all nonsmokers, aged between 18 and 22 years old. HRV was analyzed in the following periods: control protocol-the 10-min periods before the performance of the task and the 5-min periods during the performance of the test. Following tests for normality; Kruskal-Wallis technique and principal component analysis-it was decided that this type ofmental stimulation did not lead to significant changes in any of the seven combinations of chaotic globals. In conclusion, it was suggested that the time-series be increased to 1000 RR intervals (at least 20 min of electrocardiographic data) and standard nonlinear methods be introduced in combination with spectral factors as a way of increasing the statistical significance. (C) 2015 Wiley Periodicals, Inc.