Abstract
Introduction: New generation oral anticoagulants (NOACs), which selectively and reversibly block the activity of clotting factor Xa, are now preferred as first-line therapy for preventing ischemic stroke in the treatment of atrial fibrillation (AF). Edoxaban, one of these NOACs, has been shown to be as effective as warfarin in preventing stroke or systemic embolism, while carrying a lower risk of bleeding and cardiovascular death. Mean platelet volume (MPV), as an indicator of platelet activity, is associated with an increased risk of ischemic stroke in patients with AF. Therefore, medical therapies that reduce MPV may play an important role in preventing unwanted ischemic events.
 
 Objective: The aim of this study is to determine whether edoxaban has an effect on platelet volume and other platelet indices, in addition to its protective anticoagulant effect against ischemic stroke.
 
 Materials and Methods: The study was designed as a retrospective cross-sectional study. Two hundred non-valvular AF patients without a history of oral anticoagulant use were included in the study. Complete blood count (CBC) and basic biochemical parameters (urea, creatinine, electrolytes, etc.) were recorded from the hospital registration system before edoxaban treatment was started, along with basic demographic data. The CBCs of the patients were reevaluated an average of 6 months (184 ± 9 days) after edoxaban treatment initiation, and platelet indices after edoxaban treatment were compared. Results were presented as mean ± standard deviation and percentage. Data were compared using Student's t-test and Wilcoxon test, and p
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