Abstract
Purpose
Elevated red blood cell distribution width (RDW) has been associated with atrial fibrillation (AF) in cross-sectional and prospective studies. In this study, we aim to evaluate the relation of preablation RDW levels to late AF recurrence following cryoablation.
Methods
A total of 299 patients with symptomatic paroxysmal or persistent AF despite ≥1 antiarrhythmic drug(s) who were scheduled for cryoballoon-based AF ablation were enrolled in this prospective study.
Results
A total of 299 patients (55.40 ± 10.60years, 49.20 % male) were involved and followed up at a median time of 24 (6–44) months. Patients with late AF recurrence had higher RDW levels (14.30 ± 0.93 vs. 13.52 ± 0.93 %, p < 0.001). Multivariate Cox proportional hazard regression analysis showed that RDW level was an independent predictor for late AF recurrence (HR 1.88, 95 % CI 1.41–2.50, p < 0.001) along with left atrial (LA) diameter (HR 3.09, 95 % CI 1.81–5.27, p < 0.001), duration of AF (HR 1.04, 95 % CI 1.01–1.07, p = 0.02), and early AF recurrence (HR 6.39, 95 % CI 3.41–11.97, p < 0.001). A cut-off level of 13.75 % for RDW predicted late AF recurrence following cryoballoon-based pulmonary vein isolation (PVI) with a sensitivity and specificity of 78.00 and 70.00 %, respectively.
Conclusion
These findings suggest that elevated RDW may be a predictor of late recurrence following cryoballoon-based AF ablation. Further studies are needed to establish its exact pathophysiologic and prognostic roles.
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Gurses, K.M., Yalcin, M.U., Kocyigit, D. et al. Red blood cell distribution width predicts outcome of cryoballoon-based atrial fibrillation ablation. J Interv Card Electrophysiol 42, 51–58 (2015). https://doi.org/10.1007/s10840-014-9959-y
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DOI: https://doi.org/10.1007/s10840-014-9959-y