ArticleCardiovascular diabetology2025
Patients with persistent atrial fibrillation and metabolic comorbidities have an altered inflammatory state of atrial epicardial adipose tissue, which is linked to CT-attenuation.
Article in Cardiovascular diabetology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundEpicardial adipose tissue (EAT) is linked to both Atrial fibrillation (AF) and metabolic syndrome (MetS). Whether EAT inflammation relates to AF type, recurrence after ablation, or MetS, is incompletely known, likewise if it can be measured by CT angiography.
aimTo establish the link between (1) atrial EAT inflammatory composition and AF type, AF recurrence, and metabolic comorbidities. (2) EAT inflammation and EAT-volume or density.
methodsPatients undergoing thoracoscopic ablation for advanced AF (that is, usually persistent, with enlarged left atria and previous failed ablations) with a cardiac CT-scan before and 6 months after surgery were enrolled. CT-EAT atrial volume and attenuation (density), were used for analyses. Patients' left atrial appendages (LAA + EAT) were excised during ablation and stained for adipocytes and different inflammatory cells.
resultsAmong the 134 included patients, 113 had a LAA available for (immuno)histo-chemistry. Patients with persistent versus paroxysmal AF had more EAT neutrophils: 155[257] versus 63[106] cells/mm
conclusionPatients with persistent versus paroxysmal AF exhibited increased EAT neutrophils, which is reflected by CT-EAT-attenuation. Those with AF recurrence, hypertension and diabetes had adipocyte hypertrophy which may imply a common mechanism underlying these conditions.
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