Predictive Value of Red Blood Cell Distribution Width and Atrial Diameter in Paroxysmal Atrial Fibrillation: A Cross-Sectional Study.

BACKGROUND Atrial fibrillation (AF) is the most common arrhythmia and is associated with deleterious consequences. In addition to worsening a patient's quality of life, AF is associated with stroke, heart failure, and increased mortality. Red blood cell distribution width (RDW) has been associated with an increased risk of death and adverse cardiovascular outcomes, while left atrial enlargement has been linked to atrial fibrillation (AF). However, the relationship among RDW, atrial diameter (AD), and paroxysmal AF is uncertain. The aim of this study was to investigate the relationship among RDW, atrial diameter, and paroxysmal AF. MATERIAL AND METHODS A total of 22 patients with paroxysmal AF and 100 patients with non-AF were included in the study. The demographic variables and baseline clinical characteristics of both groups were analyzed. RESULTS The demographics and comorbidities were comparable between the paroxysmal AF and control groups, except for BMI (body mass index). RDW, high-sensitivity C-reactive protein (hs-CRP) levels, NT-pro-BNP levels, MPV/PLT (mean platelet volume/total platelet count), LAD, RAD, and CHA2DS2-VASc score were higher in the paroxysmal AF group versus the control group (P<0.05). Binary logistic regression analyses demonstrated that RDW (OR: 2.557, 95% CI: 1.481~4.414), Hs-CRP(OR: 1.445, 95% CI: 1.144~1.825), MPV/PLT (OR: 1.342, 95% CI: 1.047~1.720), LAD (OR: 1.068, 95% CI: 1.007~1.132), and CHA₂DS₂-VASc score (OR: 1.645, 95% CI: 1.042~2.597) were independent predictors for paroxysmal AF (P<0.05, respectively). The ROC analysis showed that the area under the curve for LAD was 0.692, the area under the curve for RAD was 0.566, the area under the curve for RDW was 0.811, and the area under the curve for MPV/PLT was 0.671. CONCLUSIONS LAD, RDW, and MPV/PLT were associated with paroxysmal AF.