Improvement of Atrial Signal-Averaged Electrocardiographic Abnormalities After Radiofrequency Catheter Ablation in Persistent Atrial Flutter

Fumiharu Miura; Hidekazu Hirao; Yukiko Nakano; Hiroki Teragawa; Tetsuji Shingu; Kazuaki Chayama

doi:10.1536/jhj.45.761

Clinical Studies

Improvement of Atrial Signal-Averaged Electrocardiographic Abnormalities After Radiofrequency Catheter Ablation in Persistent Atrial Flutter

Fumiharu Miura, Hidekazu Hirao, Yukiko Nakano, Hiroki Teragawa, Tetsuji Shingu, Kazuaki Chayama

Author information

Fumiharu Miura
Department of Medicine and Molecular Science, Division of Frontier Medical Science, Programs for Biomedical Research, Graduate School of Biomedical Sciences, Hiroshima University
Hidekazu Hirao
Department of Medicine and Molecular Science, Division of Frontier Medical Science, Programs for Biomedical Research, Graduate School of Biomedical Sciences, Hiroshima University
Yukiko Nakano
Department of Medicine and Molecular Science, Division of Frontier Medical Science, Programs for Biomedical Research, Graduate School of Biomedical Sciences, Hiroshima University
Hiroki Teragawa
Department of Medicine and Molecular Science, Division of Frontier Medical Science, Programs for Biomedical Research, Graduate School of Biomedical Sciences, Hiroshima University
Tetsuji Shingu
Department of Medicine and Molecular Science, Division of Frontier Medical Science, Programs for Biomedical Research, Graduate School of Biomedical Sciences, Hiroshima University
Kazuaki Chayama
Department of Medicine and Molecular Science, Division of Frontier Medical Science, Programs for Biomedical Research, Graduate School of Biomedical Sciences, Hiroshima University

Keywords: Atrial flutter, Interatrial conduction abnormalities, P wave signal-averaged ECG, Filtered P wave duration, Radiofrequency catheter ablation

JOURNAL FREE ACCESS

2004 Volume 45 Issue 5 Pages 761-770

DOI https://doi.org/10.1536/jhj.45.761

Details

Abstract

It has been reported that abnormalities of atrial conduction are present in patients with atrial flutter (AFL). We analyzed the P wave signal-averaged ECG (PSE) in patients after cardioversion of chronic AFL by radiofrequency catheter ablation (RFCA) to determine whether abnormalities of atrial conduction exist in patients with AFL and whether they recover. We studied 11 patients undergoing ablation of persistent AFL (AFL group), 11 patients with paroxysmal AFL (PAFL group), and 14 patients without any evidence of arrhythmias (control group). The PSEs were recorded 1 day, 7 days, and 1 month after RFCA. The filtered P wave duration (FPD) was calculated from the PSE recording. The FPD correlated with interatrial conduction time (r = 0.644) and left atrial dimension (r = 0.675) in combined assessment of the AFL and PAFL groups. The FPD was longer in the AFL group 1 day (165 ± 14 ms, P < 0.001) and 1 month (150 ± 18 ms, P < 0.05) after RFCA than in the control group (134 ± 10 ms). Our findings suggest that atrial conduction abnormalities detected by PSE are present in patients with persistent AFL and improve 1 month after cardioversion.

Corresponding author

Register with J-STAGE for free!