Atrial fibrillation (AF) is a growing public health concern associated with significant morbidity, mortality and impaired quality of life. Despite evidence supporting cardiac rehabilitation (CR) as part of secondary prevention in AF care, referral rates remain low, and the extent of CR needs in this population is unknown. This protocol outlines a nationwide survey-based and registry-based study aiming to: i) describe CR needs among individuals with AF and ii) assess eligibility and acceptance of referral to specific CR components based on individual patient preferences and their overlap with identified needs.

This cross-sectional study includes three phases: 1) identification of the study population using Danish national registries; 2) electronic survey distribution to individuals with a first-time AF diagnosis in 2023–2024 and 3) registry data enrichment of the entire population. The survey includes validated patient-reported outcome measures aligned with a newly developed Needs Assessment Model, supplemented by items on patient preferences for CR components. Data are analysed descriptively and using correlation analysis.

Participants are informed of the study purpose, data protection and their rights before providing informed consent through survey participation. The study follows the Declaration of Helsinki and Danish ethical standards. Findings are disseminated via scientific journals, conferences, a cross-sectoral stakeholder workshop and public outreach activities.

NCT06772207.