RESUMO
OBJECTIVE: Using P-wave signal-averaged electrocardiography, we assessed the patterns of atrial electrical activation in patients with idiopathic atrial fibrillation as compared with patterns in patients with atrial fibrillation associated with structural heart disease. METHODS: Eighty patients with recurrent paroxysmal atrial fibrillation were divided into 3 groups as follows: group I - 40 patients with atrial fibrillation associated with non-rheumatic heart disease; group II - 25 patients with rheumatic atrial fibrillation; and group III - 15 patients with idiopathic atrial fibrillation. All patients underwent P-wave signal-averaged electrocardiography for frequency-domain analysis using spectrotemporal mapping and statistical techniques for detecting and quantifying intraatrial conduction disturbances. RESULTS: We observed an important fragmentation in atrial electrical conduction in 27 percent of the patients in group I, 64 percent of the patients in group II, and 67 percent of the patients in group III (p=0.003). CONCLUSION: Idiopathic atrial fibrillation has important intraatrial conduction disturbances. These alterations are similar to those observed in individuals with rheumatic atrial fibrillation, suggesting the existence of some degree of structural involvement of the atrial myocardium that cannot be detected with conventional electrocardiography and echocardiography
Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Fibrilação Atrial , Eletrocardiografia , Cardiopatia Reumática , Fibrilação Atrial , Estudos Transversais , Átrios do Coração , Cardiopatia Reumática , Taquicardia ParoxísticaRESUMO
Novos horizontes säo abertos no resgaste pré-hospitalar com o advento de novos cursos para o pessoal especializado e para a comunidade. Novos equipamentos foram e estäo sendo desenvolvidos para o melhor o trabalho pré-hospitalar. Todo esse esforço e essa nova tecnologia têm contribuído para a melhora da qualidade de atendimento nos últimos anos em nosso país.