Atrial fibrillation (AF) is a prevalent arrhythmia, particularly among the elderly, posing significant risks such as stroke. Improved detection methods, including prolonged ECG monitoring, are essential for early diagnosis and treatment. European Society of Cardiology guidelines increasingly advocate for longer monitoring periods, with portable and user-friendly devices showing promise in enhancing detection rates. However, further research and multi-center trials are needed to determine the optimal duration of monitoring and its clinical benefits.