Abstract
This study sought to determine the differences between the prothrombotic properties and chamber characteristics in patients with lone atrial fibrillation (AF) and those with AF and comorbidities. Thromboembolic risk is increased in patients with AF; however, whether this is due to AF per se or its comorbidities remains unclear. A total of 87 patients undergoing ablation were prospectively recruited for the study, including 30 patients with lone AF, 30 patients with AF and comorbidities in sinus rhythm, and 27 patients with left-sided accessory pathways as controls. Blood samples were obtained from the left atrium (LA), right atrium (RA), and femoral vein (FV) after transseptal puncture. Platelet activation (P-selectin) was measured by flow cytometry. Thrombin generation (thrombin-antithrombin [TAT] complex), endothelial dysfunction (asymmetric-dimethylarginine [ADMA]), and platelet-derived inflammation (soluble CD40 ligand [sCD40L]) were measured using enzyme-linked immunosorbent assay. Platelet activation in the LA was significantly elevated compared to that in the FV in patients with lone AF and those with AF and comorbidities compared with that in the FV (p < 0.05 respectively). Thrombin generation was significantly elevated...Continue Reading
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