Dynamical analysis of the nonlinearity in the model of acute myocardial ischemia / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 770-774, 2004.
Artigo
em Chinês
| WPRIM
| ID: wpr-342615
ABSTRACT
By analyzing the electrocardiosignals, many scholars have found remarkable and outstanding dynamic characteristics in both normal hearts and sick hearts. Based on those findings, a model of acute myocardial ischemia of six rabbits is designed by us and is presented here. The electrocardiogram (ECG) signals of different time series are calculated, and the figures of correlation dimensions-time and the maximum Lyapunov exponents-time are given. The results show that the existence of myocardial ischemia will bring the decline of the value of maximum Lyapunov exponents and correlation dimensions, after the figures being analyzed with electrophysiological and anatomical knowledge. The maximum Lyapunov exponents of ECG demonstrate the chaotic quality of the system and the correlation dimension of ECG demonstrates the complexity of the system, and there is no explicit relation between them. Correlation dimensions of ECG signals might be more influenced by partial heart system, compared with the maximum Lyapunov exponents of ECG signals.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Fisiologia
/
Processamento de Sinais Assistido por Computador
/
Isquemia Miocárdica
/
Dinâmica não Linear
/
Eletrocardiografia
/
Frequência Cardíaca
/
Modelos Biológicos
/
Modelos Cardiovasculares
Tipo de estudo:
Estudo prognóstico
Limite:
Animais
Idioma:
Chinês
Revista:
Journal of Biomedical Engineering
Ano de publicação:
2004
Tipo de documento:
Artigo
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