The Reappraisal of Atrial Fibrillation: Interaction between hyperCoagulability, Electrical remodeling, and Vascular Destabilisation in the Progression of atrial fibrillation (RACE V) is a network (https://race-v.org) of researchers from Groningen, Maastricht and Leiden, financially supported by the Netherlands Heart Foundation. The main research question is to identify parameters associated with AF progression and morbidity and mortality in atrial fibrillation. Findings and opinions are shared with patients and general population via website.