O eletrocardiograma de alta resolução da onda P em pacientes com história de fibrilação atrial paroxística / The P-Wave Signal-Averaged Electrocardiogram in Patients with Episodes of Paroxysmal Atrial Fibrillation
Arq. bras. cardiol
;
64(4): 311-313, Abr. 1995. ilus
Artigo
em Português
| LILACS
| ID: lil-319687
ABSTRACT
PURPOSE--To study by using the signal-averaged P wave, the atrial activation of patients with documented episodes of paroxysmal atrial fibrillation (PAF). METHODS--This study enrolled a total of 20 patients with documented episodes of paroxysmal atrial fibrillation (males 14; mean age 58.4 +/- 10.6 years). The signal-averaged P wave was recorded with a Corazonix Predictor II system. The total P wave duration was determined from the combined filtered x,y,z vector-magnitude and used for analysis. The results were compared with a normal group of 10 patients, matched in age. RESULTS--In the control group, the total P wave duration ranged from 120.0 to 135.0 (mean = 128.3 +/- 5.8) ms. In the group of PAF, the total P wave duration ranged from 118.0 to 168.5 (mean = 151.5 +/- 13.7) ms (p < 0.000). Sixteen (80) of this patients showed a P wave duration > 140.0 ms. With a cut < 140.0 ms for the normal atrial activation, the sensitivity was 76, specificity was 100, positive and negative predictive value were 100 and 60 respectively for the method detected patients with PAF. CONCLUSION--Patients with PAF showed a prolonged signal-averaged P wave duration and should be differentiated by this method from the normal population.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Fibrilação Atrial
/
Taquicardia Paroxística
/
Eletrocardiografia
Tipo de estudo:
Estudo diagnóstico
/
Estudo prognóstico
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Português
Revista:
Arq. bras. cardiol
Assunto da revista:
Cardiologia
Ano de publicação:
1995
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Hospital Pró-Cardíaco/BR
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