AI Article Synopsis
- Atrial Epicardial Adipose Tissue (EAT) is thought to play a role in atrial fibrillation (AF) development, and this study aims to explore its connection to postoperative AF (POAF) in patients undergoing cardiac surgery.
- The study involved analyzing pre-operative scans of 83 patients to measure EAT volumes, but while age and left atrial volume were linked to POAF risk, EAT volume itself did not show a significant relationship.
- The findings suggest that while EAT may not significantly contribute to POAF occurrence, factors like age and left atrial volume are more critical, indicating that surgical factors might overshadow EAT's potential influence.
Article Abstract
Background: Atrial Epicardial Adipose Tissue (EAT) is presumably involved in the pathogenesis of atrial fibrillation (AF). The transient nature of postoperative AF (POAF) suggests that surgery-induced triggers provoke an unmasking of a pre-existent AF substrate. The aim is to investigate the association between the volume of EAT and the occurrence of POAF. We hypothesise that the likelihood of developing POAF is higher in patients with high compared to low left atrial (LA) EAT volumes.
Methods: Quantification of LA EAT based on the Hounsfield Units using custom made software was performed on pre-operative coronary computed tomography angiography scans of patients who underwent cardiac surgery between 2009 and 2019. Patients with mitral valve disease were excluded.
Results: A total of 83 patients were included in this study (CABG = 34, aortic valve = 33, aorta ascendens n = 7, combination n = 9), of which 43 patients developed POAF. The EAT percentage in the LA wall nor indexed EAT volumes differed between patients with POAF and with sinus rhythm (all P > 0.05). In multivariable analysis, age and LA volume index (LAVI) were the only independent predictors for early POAF (OR: 1.076 and 1.056, respectively).
Conclusions: As expected, advanced age and LAVI were independent predictors of POAF. However, the amount of local EAT was not associated with the occurrence of AF after cardiac surgery. This suggests that the role of EAT in POAF is rather limited, or that the association of EAT in the early phase of POAF is obscured by the dominance of surgical-induced triggers.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8984634 | PMC |
| http://dx.doi.org/10.1016/j.ijcha.2022.100976 | DOI Listing |
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