Correlation between inflammation state and successful medical cardioversion using bepridil for refractory atrial fibrillation

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Abstract

Background: It has been reported that inflammation is associated with long-term maintenance of sinus rhythm after electrical cardioversion for non-valvular atrial fibrillation (AF). However, the relation between high-sensitive C-reactive protein (hs-CRP) and the recurrence of AF after medical cardioversion is unknown. On the other hand, bepridil is very effective in restoring sinus rhythm for patients with refractory AF. Methods and results: In 119 patients with non-valvular AF lasting >6 months who failed to maintain sinus rhythm after medical cardioversion without bepridil or electrical cardioversion, we prescribed bepridil. We divided our patients into success group who maintained sinus rhythm for at least 6 months using bepridil and failure group, and compared the following parameters, which were measured just before prescription of bepridil, between the two groups: hs-CRP as a marker of inflammation, left ventricular end-diastolic dimension, ejection fraction, and left atrial dimension as echocardiographic markers, and the incidence of dyslipidemia, hypertension, and diabetes mellitus. After the treatment with bepridil, 57 patients converted to sinus rhythm; however, 12 patients among these 57 patients could not maintain sinus rhythm. Therefore, the success group consisted of 45 patients (38%). Univariate analysis revealed that left atrial dimension and the value of hs-CRP were significantly lower and ejection fraction was significantly higher in the success group than the failure group. Multivariate analysis showed that hs-CRP and left atrial dimension were independent factors for AF recurrence. Conclusions: Bepridil is effective in restoring sinus rhythm for refractory AF patients. Inflammation, in addition to left atrial dimension, may be associated with successful cardioversion using bepridil. © 2013 Japanese College of Cardiology.

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Nishino, M., Mori, N., Nakamura, D., Lee, Y., Yoshimura, T., Taniike, M., … Yamada, Y. (2013). Correlation between inflammation state and successful medical cardioversion using bepridil for refractory atrial fibrillation. Journal of Cardiology, 62(2), 117–120. https://doi.org/10.1016/j.jjcc.2013.03.003

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