Relaçäo entre os comportamentos das dispersões da onda P e o intervalo QT em idosos com insuficiência cardíaca / Relation between the behaviors of P-wave and QT dispersions in elderly patients with heart failure
Arq. bras. cardiol
; 79(5): 494-499, nov. 2002. tab, graf
Artigo
em Português, Inglês
| LILACS
| ID: lil-325520
Biblioteca responsável:
BR1.1
ABSTRACT
OBJECTIVE - To assess the relation between P-wave and QT dispersions in elderly patients with heart failure. METHODS - Forty-seven elderly patients (75.6±6 years) with stable heart failure in NYHA functional classes II or III and with ejection fractions of 37±6 percent underwent body surface mapping to analyze P-wave and QT dispersions. The degree of correlation between P-wave and QT dispersions was assessed, and P-wave dispersion values in patients with QT dispersion greater than and smaller than 100 ms were compared. RESULTS - The mean values of P-wave and QT dispersions were 54±14 ms and 68±27 ms, respectively. The correlation between the 2 variables was R=0.41 (p=0.04). In patients with QT dispersion values > 100 ms, P-wave dispersion was significantly greater than in those with QT dispersion values < 100 ms (58±16 vs 53±12 ms, p=0.04 ). CONCLUSION - Our results suggest that, in elderly patients with heart failure, a correlation between the values of P-wave and QT dispersions exists. These findings may have etiopathogenic, pathophysiologic, prognostic, and therapeutic implications, which should be investigated in other studies
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Eletrocardiografia
/
Insuficiência Cardíaca
Tipo de estudo:
Estudo prognóstico
Limite:
Idoso
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
/
Português
Revista:
Arq. bras. cardiol
Assunto da revista:
Cardiologia
Ano de publicação:
2002
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade de Säo Paulo/BR