Influence of age, lead axis, frequency of arrhythmic episodes, and atrial dimensions on P wave triggered SAECG in patients with lone paroxysmal atrial fibrillation

Antonio Michelucci, Luigi Padeletti, Andrea Chelucci, Alessandro Mezzani, Maria C. Porciani, Federico Caruso, Emanuele Lebrun, Francesca Bacci, Moira Martelli, Gian Franco Gensini

Research output: Contribution to journalArticle

Abstract

Signal-averaged P wave of 42 patients with lone paroxysmal atrial fibrillation (PAF) and 29 normal subjects (N) were recorded, using three orthogonal leads and analyzed in the time and frequency (entire P wave or a 100-ms segment ranging from 75 ms before to 25 ms after the end of P wave) domains. PAFs were divided into a group of 12 having ≥ 2 attacks a month (HF) and a group of 30 having ≤ 2 attacks a year (LF). Statistically significant differences were absent with regard to ages of PAF and N; ages of HF, LF, and N at the time of signal-averaged ECG; ages of HF and LF at the time of the first arrhythmic episode; and elapsed times from the first episode. Length alp wave and some frequency-domain parameters were found to be significantly correlated with age. PAF showed a significantly longer duration of P wave in the frontal plane using the time-domain analysis. Frequency analysis was found to be useful in evaluating the influence of attack frequency. HF showed significantly higher values of some frequency- domain parameters than LF and N, while the three groups did not differ for time-domain analysis. P wave duration and frequency con ten t of the three orthogonal leads proved to be significantly different in PAF and N. Right and left atrial echocardiographic dimensions proved to be higher (even if within normal limits) in HF than in LF and N. Results suggest that frequency analysis should be performed on the entire P wave.

Original languageEnglish
Pages (from-to)758-767
Number of pages10
JournalPACE - Pacing and Clinical Electrophysiology
Volume19
Issue number5
DOIs
Publication statusPublished - 1996

Keywords

  • atrial fibrillation
  • P wave
  • signal averaging

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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