Variabilidade espontânea da extra-sistolia ventricular na cardiopatia chagásica crônica / Spontaneous variabitity of ventricular extrasystole in chronic Chagas cardiopathy
Arq. bras. cardiol
; Arq. bras. cardiol;56(6): 445-450, jun. 1991. tab
Article
em Pt
| LILACS
| ID: lil-107794
Biblioteca responsável:
BR1.1
ABSTRACT
Purpose - To study the spontaneous variability of single (VPCs) and coupled (CVPCs) in patients with chronic Chagas' disease (CCD). Patients and Methods - Twenty patients with CCD, 14 male, in class I and III NYHA, with frequent VPCs and VCPCs, free of drug therapy were studied.21 hour Holter monitoring was done for 4 subsequent days. The data analysis assessed the variation in the frequency of VPCs and CVPCs between patients, seven hour periods one hour periods in a hierarchical model by a Poisson process. Results - a) the frequency of VPCs follows a circadian rhythm, closely related to the hourly variations of the mean heart rate; b) disregarding the heart rate influence on the variability of the ventricular arrhythmia, its behavior was at random and unpredictable; c) the minimal percentual reduction in VPCs/h that discriminated between antiarrhythmic effect and spontaneous between antiarrhythmic effect and spontaneous variability was 121.86% for sevenhour, 58.42% for 21-hour and 38.45% for 42-hour electrocardiographic monitoring periods; d) the same approch for the VCPCs revealed values of 133,8%, 63.21% and 41.3% respectively
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Cardiomiopatia Chagásica
Limite:
Adult
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Female
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Humans
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Male
Idioma:
Pt
Ano de publicação:
1991
Tipo de documento:
Article