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Journal of Cardiothoracic Surgery
Published in: Journal of Cardiothoracic Surgery 1/2011

Open Access 01-12-2011 | Research article

Prognostic factors of atrial fibrillation following elective coronary artery bypass grafting: the impact of quantified intraoperative myocardial ischemia

Authors: Efstratios N Koletsis, Christos Prokakis, James R Crockett, Panagiotis Dedeilias, Matthew Panagiotou, Nikolaos Panagopoulos, Nikolaos Anastasiou, Dimitrios Dougenis, Efstratios Apostolakis

Published in: Journal of Cardiothoracic Surgery | Issue 1/2011

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Abstract

Background

Atrial fibrillation (AF) occurs in 28-33% of the patients undergoing coronary artery revascularization (CABG). This study focuses on both pre- and peri-operative factors that may affect the occurrence of AF. The aim is to identify those patients at higher risk to develop AF after CABG.

Patients and methods

Two patient cohorts undergoing CABG were retrospectively studied. The first group (group A) consisted of 157 patients presenting AF after elective CABG. The second group (group B) consisted of 191 patients without AF postoperatively.

Results

Preoperative factors presenting significant correlation with the incidence of post-operative AF included: 1) age > 65 years (p = 0.029), 2) history of AF (p = 0.022), 3) chronic obstructive pulmonary disease (p = 0.008), 4) left ventricular dysfunction with ejection fraction < 40% (p = 0.015) and 5) proximal lesion of the right coronary artery (p = 0.023). The intraoperative factors that appeared to have significant correlation with the occurrence of postoperative AF were: 1) CPB-time > 120 minutes (p = 0.011), 2) myocardial ischemia index < 0.27 ml.m2/Kg.min (p = 0.011), 3) total positive fluid-balance during ICU-stay (p < 0.001), 4) FiO2/PO2 > 0, 4 after extubation and during the ICU-stay (p = 0.021), 5) inotropic support with doses 15-30 μg/Kg/min (p = 0.016), 6) long ICU-stay recovery for any reason (p < 0.001) and perioperative myocardial infarction (p < 0.001).

Conclusions

Our results suggest that the incidence of post-CABG atrial fibrillation can be predicted by specific preoperative and intraoperative measures. The intraoperative myocardial ischemia can be sufficiently quantified by the myocardial ischemia index. For those patients at risk we would suggest an early postoperative precautionary anti-arrhythmic treatment.
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Metadata
Title
Prognostic factors of atrial fibrillation following elective coronary artery bypass grafting: the impact of quantified intraoperative myocardial ischemia
Authors
Efstratios N Koletsis
Christos Prokakis
James R Crockett
Panagiotis Dedeilias
Matthew Panagiotou
Nikolaos Panagopoulos
Nikolaos Anastasiou
Dimitrios Dougenis
Efstratios Apostolakis
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Journal of Cardiothoracic Surgery / Issue 1/2011
Electronic ISSN: 1749-8090
DOI
https://doi.org/10.1186/1749-8090-6-127

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