By Tarun Sai Lomte Reviewed by Susha Cheriyedath, M.Sc. Mar 30 2026 A new study suggests that AF may impair the brain’s waste-clearance system and that restoring sinus rhythm with catheter ablation could help improve this process, offering new clues to why AF is linked to cognitive decline. Study: Atrial fibrillation catheter ablation, brain glymphatic function, and cognitive performance . Image Credit: Magic mine / Shutterstock In a study published in the  European Heart Journal , researchers