Evaluation of cardiac autonomic modulation using symbolic dynamics after cardiac transplantation
Rev. bras. cir. cardiovasc
;
34(5): 572-580, Sept.-Oct. 2019. tab, graf
Artigo
em Inglês
| LILACS
| ID: biblio-1042041
ABSTRACT
Abstract Objective:
To characterize the behavior of cardiac autonomic modulation in individuals with different times after orthotopic heart transplantation (HTx) using symbolic dynamics analysis.Methods:
Sixty patients were evaluated after HTx. We recorded their instantaneous R-R intervals (RRi) by cardiac monitor Polar® RS800CX™ (Polar Electro Oy, Kempele, Finland) for 10 minutes. The same sequence of RRi with 256 consecutive beats was used to perform spectral analysis and symbolic dynamics analysis. We used hierarchical clustering to form groups. One-way analysis of variance (ANOVA) (with Holm-Sidak method) or one-way Kruskal-Wallis test (with Dunn´s post-hoc test) was used to analyze the difference between groups. Linear correlation analysis between variables was performed using Pearson's or Spearman's tests. P-value < 0.05 was considered statistically significant.Results:
The 0V% index increased, the 2UV% index and the normalized complexity index decreased with an increase of HTx postoperative time. There were a negative correlation between complexity indexes and 0V% and a positive correlation between complexity indexes and 2UV%.Conclusion:
Symbolic dynamics indexes were able to show a specific cardiac autonomic modulation pattern for HTx recipients with different postoperative times.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Sistema Nervoso Parassimpático
/
Sistema Nervoso Simpático
/
Transplante de Coração
/
Dinâmica não Linear
/
Coração
Tipo de estudo:
Estudo observacional
/
Estudo de prevalência
/
Estudo prognóstico
/
Fatores de risco
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Rev. bras. cir. cardiovasc
Assunto da revista:
Cardiologia
/
Cirurgia Geral
Ano de publicação:
2019
Tipo de documento:
Artigo
País de afiliação:
Brasil
/
Itália
Instituição/País de afiliação:
Federal University of Sergipe/BR
/
Federal University of São Carlos/BR
/
Medical School of São José do Rio Preto/BR
/
Universidade de São Paulo/BR
/
University of Milan/IT
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