Funding Information: Open access funding provided by FCT|FCCN (b-on). This work was supported by a PhD scholarship from CUF. The funder had no role in the design, data collection, data analysis, or reporting of this study. Publisher Copyright: © The Author(s) 2025.; Introduction: Obstructive sleep apnea syndrome (OSAS) is highly prevalent in patients with atrial fibrillation (AF) and may influence rhythm contro...