 Atrial fibrillation AF is the most common arrhythmia in Germany and is associated with an increased risk of thromboembolic stroke. The risk to suffer from AF increases with age. Early detection of AF and anticoagulation seem the most effective way of preventing ischaemic stroke in patients at risk. The guidelines of the European Society of Cardiology recommend opportunistic screening for AF by pulse check at each general practitioner visit for all patients aged 65 years or older. 