The Impact of Catheter Ablation on Biochemical Markers of Collagen Turnover in Patients with Persistent Atrial Fibrillation
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概要
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<B>Background:</B> Previous study reported that biochemical markers of collagen turnover, such as transforming growth factor beta 1 (TGFβ-1), matrix metalloproteinase-1 (MMP-1) and tissue inhibitor of matrix metalloproteinase-1 (TIMP-1), reflected the fibrosis of atrium in patients with atrial fibrillation (AF). Left atrium (LA) volume could be reduced by catheter ablation (CA) for AF, but the effect of CA on atrial fibrosis remains unknown. We investigated the impact of CA on LA volume and atrial fibrosis by assessing such biochemical markers. <B>Methods and Results:</B> Study population consisted of 16 patients underwent CA to persistent AF. We determined LA volumes by 64-row multidetector CT, and measured 3 biochemical markers (TGFβ-1, MMP-1 and TIMP)-1 before, 3 months, and >12 months after CA. At baseline, plasma TGFβ-1 level was significantly correlated with end-diastolic (LAEDV; r=0.762, ρ=0.0003) and end-systolic LA volumes (LAESV; γ=0.743, ρ=0.0006). CA significantly decreased LAEDV by 25±13% and LAESV by 41±15%. Though TGFβ-1 levels (17.8±10.4, 23.1±12.9, 21.9±14.7 ng/ml) and TIMP-1 levels (129.1±36.4, 161.3±50.4, 146.9±25.2 ng/ml) didn’t change significantly after CA, MMP-1 levels (6.2±5.6, 5.9±4.5, 7.9±6.8 ng/ml) significantly increased in chronic phase (ρ=0.015). <B>Conclusions:</B> The plasma TGFβ-1 level, which is a marker of inflammation, was significantly correlated with enlarged LA in patients with persistent AF. Sinus conversion by CA reduced LA volume, and increased serum MMP-1 level, suggesting recovery from atrial remodeling and fibrosis.
著者
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Inoue Koichi
Sakurabashi Watanabe Hospital
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Kimura Ryusuke
Sakurabashi Watanabe Hospital
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Toyoshima Yuko
Sakurabashi Watanabe Hospital
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Inoue Koichi
Sakurabashi-Watanabe Hospital
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Masuda Masaharu
Sakurabashi-Watanabe Hospital
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Doi Atsushi
Sakurabashi-Watanabe Hospital
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Kimura Ryusuke
Sakurabashi-Watanabe Hospital
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Masuda Masaharu
Sakurabashi Watanabe Hospital
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Toyoshima Yuko
Sakurabashi-Watanabe Hospital
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Doi Atsushi
Sakurabashi Watanabe Hospital
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