Kim W, Na JO, Thomas RJ, et al. - Researchers sought to determine how radio‐frequency catheter ablation (RFCA) can impact sleep quality in patients suffering from paroxysmal atrial fibrillation (AF) and how AF recurrence can be impacted by a change in sleep quality. This study involved 225 patients who underwent a 24‐hour Holter test within 6 months prior to RFCA for paroxysmal AF. Via cardiopulmonary coupling analysis using 24‐hour Holter data, experts evaluated sleep quality. As per findings, patients experienced improved sleep quality post-RFCA for paroxysmal AF. Patients who had unstable sleep prior to RFCA were found to have significantly lower recurrence rate. These data indicate that sleep quality can be impacted by RFCA, and sleep quality evaluation prior to RFCA may afford a risk marker for recurrence following RFCA in patients suffering from paroxysmal AF.