Key result
Left atrial integrated backscatter strongly correlates with atrial fibrosis and tracks postoperative AF.
Why the study?
The relationship between integrated backscatter and atrial fibrosis, with and without atrial fibrillation, in patients undergoing coronary bypass grafting was unclear.
Does integrated backscatter of the left atrium correlate with atrial fibrosis and postoperative atrial fibrillation in patients undergoing CABG?
Population
74 patients with coronary artery disease undergoing CABG including 18 with preoperative AF and 56 with sinus rhythm
Comparison
Patients with preoperative AF vs patients with preoperative sinus rhythm
Design
Cross-sectional study
Follow-up
In-hospital
Authors
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IBS% may quantify LA fibrosis and predict post-CABG AF; leaves open whether it refines risk stratification beyond clinical variables.
Cross-Sectional (n=74)
Does integrated backscatter of the left atrium correlate with atrial fibrosis and postoperative atrial fibrillation in patients undergoing CABG?
Effect estimate: r = 0.887
p-value: p=< 0.001
Integrated backscatter of the left atrial posterior wall provides a non-invasive, quantitative measure of atrial fibrosis that correlates with the development of postoperative atrial fibrillation in patients undergoing CABG.
Wang et al. (2009) conducted a cross-sectional in Coronary artery disease (n=74). Integrated backscatter (IBS) of the left atrial posterior wall was evaluated on Correlation between integrated backscatter (IBS%) and atrial fibrosis (collagen volume fraction) (r = 0.887, p=< 0.001). Integrated backscatter of the left atrial posterior wall positively correlated with atrial fibrosis (r = 0.887, p < 0.001) and was significantly higher in patients with postoperative atrial fibrillation (p < 0.001).
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