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A Journal on Heart and Vascular Diseases
Official Journal of the Italian Society of Angiology and Vascular Pathology
Indexed/Abstracted in: EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,752
Minerva Cardioangiologica 2008 October;56(5):477-82
The effect of conversion type on P wave dispersion in patients with atrial fibrillation
Dogan A. 1, Varol E. 2, Ozaydin M. 1, Acar G. 1, Gedikli O. 1, Altinbas A. 1, Kinay O. 1, Nazli C. 1, Kahraman H. 1, Ergene O. 1
1 Department of Cardiology, Medical School Suleyman Demirel University, Isparta, Turkey
2 Cardiology Unit, Public Hospital, Isparta, Turkey
Aim. The aim of this study was to investigate whether conversion type of atrial fibrillation (AF) to sinus rhythm affects the P wave dispersion (PD) in patients with AF.
Methods. Based on conversion type, 95 consecutive patients with AF <3 months were divided into 3 groups: spontaneous cardioversion (SC) (N.=33, mean age: 60.6±11.6 years), pharmacologic cardioversion (PC) (N.=32, mean age: 59.2±9.6 years) and electrical cardioversion (EC) (N.= 30, mean age: 65.3±10.6 years). P wave duration (maximum and minimum) were measured in 12-lead ECG, and PD was calculated.
Results. Left atrial diameter and AF duration were significantly higher in EC (43.6±4.8 mm and 794.1±815.1 h) than SC (38.5±3.9 mm and 13.8±18.3 h) and PC (40.9±4.5 mm and 65.3±148.5 h) groups (P<0.01). P maximum was much longer in EC group compared with SC and PC group (121.6±9.7, 108.4±6.4 and 115.8±8.6 ms, P=0.01, respectively). There was a significant difference in PD among SC, PC and EC groups (44.4±9.2, 49.5±8.7 and 53.5±8.8 ms; P=0.005, respectively). PD correlated with AF duration (r=0.36, P=0.03), left atrial diameter (r=0.45, P=0.002) and conversion type (r=0.29, P=0.03). However, there was no significant association between PD and conversion type in multivariate analysis. The prolonged PD resulted from AF duration (P=0.01) and the left atrial size P=0.001).
Conclusion. This study suggests that conversion type of AF to sinus rhythm has no effect on P wave duration and independent of AF duration and the left atrial diameter.