Journal Article

Further evidence of localized posterior interatrial conduction delay in lone paroxysmal atrial fibrillation

P. G. Platonov, S. Yuan, E. Hertervig, O. Kongstad, A. Roijer, A. B. Vygovsky, L. V. Chireikin and S. B. Olsson

in EP Europace

Published on behalf of European Heart Rhythm Association of the European Society of Cardiology (ESC)

Volume 3, issue 2, pages 100-107
Published in print April 2001 | ISSN: 1099-5129
Published online April 2001 | e-ISSN: 1532-2092 | DOI: http://dx.doi.org/10.1053/eupc.2001.0150
Further evidence of localized posterior interatrial conduction delay in lone paroxysmal atrial fibrillation

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Aims

Prolongation of interatrial conduction time has been reported in patients with paroxysmal atrial fibrillation (PAF). The study objective was to localize the region of the conduction delay in patients with lone PAF.

Methods and Results

Twenty-one patients with lone PAF and 23 patients with AV nodal re-entrant tachycardia ablation without history of PAF (control group) were recruited. Endocardial recordings were made during sinus rhythm and programmed atrial stimulation. The authors measured the interatrial conduction time, the ‘right-sided’ conduction time between the high lateral right atrium and the proximal coronary sinus (RA-CSp), and the ‘left-sided’ conduction time between the proximal and the distal coronary sinus (CSp-LA). During sinus rhythm, the interatrial conduction time was longer in the PAF group (103±19 vs 86±12 ms, P<0·01) due to delay of right-sided conduction (RA-CSp was 74±20 vs 56±10 ms, P<0·01). During programmed stimulation at the distal coronary sinus, the maximal RA-CSp time was also longer in the PAF group (110±47 vs 69±16 ms,P<0·05). No differences in CSp-LA time were observed.

Conclusion

This study supports the role of posterior septal right atrial conduction disturbances in the genesis of lone PAF.

Keywords: Lone atrial fibrillation; interatrial conduction; electrophysiology

Journal Article.  0 words. 

Subjects: Cardiovascular Medicine

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