University of Amsterdam (UvA) Aug 13 2025 A new study by researchers at the University of Amsterdam (UvA) and Amsterdam UMC shows how targeted communication can help patients engage more with online health communities. Using atrial fibrillation (AF) as a case study, the research reveals which messages are most effective in raising awareness and encouraging participation. AF is the most common type of heart rhythm disorder, where the upper chambers of the heart beat irregularly. This can lead to