Wavelength index at three atrial sites in patients with paroxysmal atrial fibrillation

L. Padeletti, A. Michelucci, T. Giovannini, M. C. Porciani, M. Bamoshmoosh, A. Mezzani, A. Chelucci, P. Pieragnoli, G. F. Gensini

Research output: Contribution to journalArticlepeer-review


The purpose of this study was to evaluate the wavelength index (WLI) at three atrial sites in a group of 23 patients with recurrent episodes of lone paroxysmal atrial fibrillation (LPAF) and a control group (n = 20). All patients underwent programmed atrial stimulation (paced cycle length = 600 ms) at high, medium, and low lateral right atrial wall. P wave duration, sinus cycle length, and corrected sinus node recovery time were not significantly different between the two study groups. WLI was calculated according to the following formulas: atrial effective refractory period (AERP)/duration of atrial extrastimulus electrogram (A2) or AERP/A2 + atrial latency; and atrial functional refractory period (AFRP)/A2. WLI was significantly shorter in LPAF than in the control group at each of the paced atrial sites independently of the formula used. Duration of premature atrial electrogram appeared to play the major role in determining the difference in WLI between patients with paroxysmal atrial fibrillation and the control group.

Original languageEnglish
Pages (from-to)1266-1271
Number of pages6
JournalPACE - Pacing and Clinical Electrophysiology
Issue number6
Publication statusPublished - 1995


  • atrial fibrillation
  • atrial refractoriness
  • wavelength

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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