Electrophysiological Analysis of Chronic Atrial Fibrillation Associated with Mitral Valve Disease by Using Spectral Analysis
Hiroshima Journal of Medical Sciences Volume 50 Issue 1
Page 27-35
published_at 2001-03
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Title ( eng ) |
Electrophysiological Analysis of Chronic Atrial Fibrillation Associated with Mitral Valve Disease by Using Spectral Analysis
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Creator |
Orihashi Kazumasa
Ishii Osamu
Matsuura Yuichiro
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Source Title |
Hiroshima Journal of Medical Sciences
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Volume | 50 |
Issue | 1 |
Start Page | 27 |
End Page | 35 |
Journal Identifire |
[PISSN] 0018-2052
[EISSN] 2433-7668
[NCID] AA00664312
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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.
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Keywords |
Chronic atrial fibrillation
Electrophysiology
Fast Fourier transform analysis
Surgical ablation
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Descriptions |
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.
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NDC |
Medical sciences [ 490 ]
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Language |
eng
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Resource Type | departmental bulletin paper |
Publisher |
Hiroshima University Medical Press
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Date of Issued | 2001-03 |
Publish Type | Version of Record |
Access Rights | open access |
Source Identifier |
[ISSN] 0018-2052
[NCID] AA00664312
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