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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
Maia, Ivan G; Cruz Filho, Fernando; Sá, Roberto; Alves, Paulo A. G.
Affiliation
  • Maia, Ivan G; Hospital Pró-Cardíaco. Pró-Ritmo. Rio de Janeiro. BR
  • Cruz Filho, Fernando; Hospital Pró-Cardíaco. Pró-Ritmo. Rio de Janeiro. BR
  • Sá, Roberto; Hospital Pró-Cardíaco. Pró-Ritmo. Rio de Janeiro. BR
  • Alves, Paulo A. G; Hospital Pró-Cardíaco. Pró-Ritmo. Rio de Janeiro. BR
Arq. bras. cardiol ; Arq. bras. cardiol;64(4): 311-313, Abr. 1995. ilus
Article in Pt | LILACS | ID: lil-319687
Responsible library: BR1.1
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.
Subject(s)
Key words
Full text: 1 Collection: 01-internacional Database: LILACS Main subject: Atrial Fibrillation / Tachycardia, Paroxysmal / Electrocardiography Type of study: Diagnostic_studies / Prognostic_studies Limits: Adult / Female / Humans / Male Language: Pt Journal: Arq. bras. cardiol Journal subject: CARDIOLOGIA Year: 1995 Document type: Article Affiliation country: Brazil Country of publication: Brazil
Full text: 1 Collection: 01-internacional Database: LILACS Main subject: Atrial Fibrillation / Tachycardia, Paroxysmal / Electrocardiography Type of study: Diagnostic_studies / Prognostic_studies Limits: Adult / Female / Humans / Male Language: Pt Journal: Arq. bras. cardiol Journal subject: CARDIOLOGIA Year: 1995 Document type: Article Affiliation country: Brazil Country of publication: Brazil