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Preoperative plasma brain natriuretic peptide level is an independent predictor of postoperative atrial fibrillation following off-pump coronary artery bypass surgery

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Abstract

Purpose

Atrial fibrillation (AF) is a frequent complication after coronary artery bypass surgery. Postoperative AF can lead to thromboembolic events, prolonged hospital stay, and increased costs. Recent reports have shown that an elevated plasma brain natriuretic peptide (BNP) level is associated with AF. The purpose of this prospective study was to test the hypothesis that preoperative BNP level is a predictor of postoperative AF following off-pump coronary artery bypass surgery (OPCAB).

Methods

One hundred and fifty patients without a history of AF undergoing elective isolated OPCAB were enrolled. Plasma BNP level was measured preoperatively. Heart rate and rhythm were continuously monitored during the first 72 h after surgery.

Results

Twenty-six patients (17.3%) exhibited postoperative AF. This proportion is similar to those reported in earlier studies. Univariate analysis demonstrated that age (odds ratio [OR], 1.060; 95% confidence interval [CI], 1.008 to 1.114; P = 0.023), previous myocardial infarction (MI; OR, 2.628; 95% CI, 1.031 to 6.697; P = 0.043), and BNP level (OR, 7.336; 95% CI, 2.401 to 22.409 / log BNP level; P < 0.001) were accurate predictors of postoperative AF. Stepwise multivariate regression analysis indicated age (OR, 1.059; 95% CI, 1.002 to 1.120; P = 0.043) and BNP level (OR, 6.272; 95% CI, 1.980 to 19.861/log BNP level; P = 0.002) as the only independent predictors of postoperative AF.

Conclusion

Preoperative BNP level is an independent predictor of postoperative AF following OPCAB. Our findings permit us to stratify the risk of AF and to plan prophylactic strategies in high-risk patients.

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Authors and Affiliations

  1. Department of Anesthesiology and Pain Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan

    Toshimasa Akazawa, Hiroko Nishihara, Hitomi Iwata, Kengo Warabi, Masayuki Ohshima & Eiichi Inada

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  1. Toshimasa Akazawa
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  2. Hiroko Nishihara
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  3. Hitomi Iwata
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  5. Masayuki Ohshima
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Akazawa, T., Nishihara, H., Iwata, H. et al. Preoperative plasma brain natriuretic peptide level is an independent predictor of postoperative atrial fibrillation following off-pump coronary artery bypass surgery. J Anesth 22, 347–353 (2008). https://doi.org/10.1007/s00540-008-0647-x

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  • DOI: https://doi.org/10.1007/s00540-008-0647-x

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