Evaluation of Cardiac Autonomic Modulation Using Symbolic Dynamics After Cardiac Transplantation
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Citações na Scopus
4
Tipo de produção
article
Data de publicação
2019
Título da Revista
ISSN da Revista
Título do Volume
Editora
SOC BRASIL CIRURGIA CARDIOVASC
Autores
MOURA-TONELLO, Silvia Cristina Garcia de
CARVALHO, Vitor Oliveira
GODOY, Moacir Fernandes de
PORTA, Alberto
LEAL, Angela Merice de Oliveira
CATAI, Aparecida Maria
Citação
BRAZILIAN JOURNAL OF CARDIOVASCULAR SURGERY, v.34, n.5, p.572-580, 2019
Resumo
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 (R) RS800CX (TM) (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.
Palavras-chave
Heart Transplantation, Autonomic Nervous System, Heart Rate Variability, Nonlinear Dynamics
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