このエントリーをはてなブックマークに追加
ID 37682
file
creator
Orihashi, Kazumasa
Ishii, Osamu
Matsuura, Yuichiro
subject
Chronic atrial fibrillation
Electrophysiology
Fast Fourier transform analysis
Surgical ablation
NDC
Medical sciences
abstract
Several authors have suggested that periodic activation is related to maintenance of atrial fibrillation (AF). The aim of this study was to examine periodic electrical activations in both atria that may lead to the generation and maintenance of AF associated with valvular diseases by means of fast Fourier transform (FFT) analysis. Atrial electrograms (AEGs) were analyzed in 15 persistent AF patients, who underwent pulmonary vein orifice (PVO) isolation with mitral valve surgery. Intraoperatively, AEGs of 4 seconds duration were acquired at 48 epicardial sites, 24 each from the right and left atrium (RA, LA). Dominant peaks (DPs) examined using FFT were present in 26% of all sampling points (380/1440). Prominent clustering of DPs was mostly observed on the LA. The mean AF cycle length (mAFCL) estimated from DP frequency was significantly shorter in LA than that in RA (178 ± 32 msec vs 24 7 ± 58, p = 0.0003). The shortest AF cycle length in each patient was mainly found in the LA. The PVO isolation procedures successfully eliminated AF in 87% of patients (13/15). In cases of recurred AF (2/15), the difference in mAFCL between bilateral atria was significantly smaller than in the case of successful AF elimination (17 ± 7 msec vs 76 ± 56, p = 0.042). FFT analysis of intraoperative mapping data clarified that periodic activity was present predominantly in LA. It may be possible to predict the efficacy of surgical procedures for eliminating AF using this technique.
description
This work was supported in part by a Grant-inAid for Scientific Research from the Ministry of Education, Science, Sports, and Culture of Japan (no. 10470275; to Dr Sueda).
The main concepts of this work were presented at the 49th international congress of the European Society for Cardiovascular Surgery, Dresden, Germany, 2000.
journal title
Hiroshima Journal of Medical Sciences
volume
Volume 50
issue
Issue 1
start page
27
end page
35
date of issued
2001-03
publisher
Hiroshima University Medical Press
issn
0018-2052
ncid
language
eng
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Biomedical Science
他の一覧