# Atrial fibrillation detection and risk factors in Germany > Developing situation record from CLSTR: https://clstr.news/situations/atrial-fibrillation-detection-and-risk-factors-in-germany > Updated: 2026-11-02T12:00:00.000Z. Sources: 10. Developments: 3. Medical discussions in Germany have highlighted the connection between sleep apnea and atrial fibrillation. Experts note that sleep apnea acts as a physiological stressor, where breathing cessations can trigger adrenaline release and rapid heartbeats, potentially turning rhythm irregularities into permanent arrhythmia. To combat the risks of this condition, which affects over 1.6 million people in Germany, there is an increasing focus on early detection. Because nearly half of all patients experience no symptoms, medical professionals emphasize the utility of wearable technology. Smartwatches and other CE-marked devices can assist in diagnosis by using infrared light to measure blood flow or by recording single-channel ECGs. Recent assessments by the Deutsche Herzstiftung indicate that modern wearables can identify this heart rhythm disorder with an accuracy rate exceeding 90 percent using infrared photoplethysmography and integrated single-channel electrocardiograms. These devices are particularly useful for detecting irregularities that occur during rest or at night, when professional monitoring is typically unavailable. However, experts, including cardiologist Prof. Dr. Peter Radke, emphasize that these devices are screening tools and cannot replace a professional medical diagnosis. They are not capable of detecting heart attacks or vascular blockages. To ensure reliable measurements, experts recommend that CE-marked devices fit snugly, approximately one finger-width above the wrist bone, and that users perform ECG readings while at rest. Early detection remains vital to preventing complications such as heart failure and ischemic strokes, for which atrial fibrillation is responsible for roughly 20 to 30 percent of cases. ## Claims - Wearables use infrared light to measure pulse waves via blood volume fluctuations. (reported by 2 sources) - Some wearables can record a 1-channel ECG to provide heart rhythm information. (reported by 2 sources) - For reliable results, CE-marked devices should be worn a finger-width above the wrist bone. (reported by 2 sources) - Regular pulse monitoring is recommended for people over 65 or those with high blood pressure. (reported by 2 sources) - Over 1.6 million people in Germany are affected by atrial fibrillation. (reported by 1 source) - Atrial fibrillation is responsible for 20 to 30 percent of ischemic strokes. (reported by 1 source) - Nearly half of all patients with atrial fibrillation show no symptoms. (reported by 1 source) ## Timeline ### 2026-11-02: Smartwatches show high accuracy in detecting atrial fibrillation Modern smartwatches can detect atrial fibrillation with over 90 percent accuracy, providing a vital screening tool for rhythm disorders during rest, though they cannot replace professional medical diagnoses. 4 sources. https://clstr.news/cluster/smartwatches-show-high-accuracy-in-detecting-atrial-fibrillation ### 2026-10-27: Wearables and smartwatches aid in detecting atrial fibrillation Smartwatches and wearables can help detect atrial fibrillation, a condition that affects 1.6 million people in Germany and increases stroke risk, by monitoring pulse waves and recording single-channel ECGs. 6 sources. https://clstr.news/cluster/wearables-and-smartwatches-aid-in-detecting-atrial-fibrillation ### 2026-10-15: Sleep apnea identified as key risk factor for atrial fibrillation Sleep apnea is a major driver of atrial fibrillation, affecting millions in Germany by causing recurring physiological stress and heart rhythm irregularities during sleep. 4 sources. https://clstr.news/cluster/sleep-apnea-linked-to-increased-risks-of-atrial-fibrillation --- Cite as: Atrial fibrillation detection and risk factors in Germany. CLSTR, https://clstr.news/situations/atrial-fibrillation-detection-and-risk-factors-in-germany