Research published in Circulation: Arrhythmia and Electrophysiology highlights a smart wristband capable of detecting cardiac arrest with 92% accuracy. The DETECT‐1b study, conducted in the Netherlands, involved 49 adults with abnormal heart rhythms. The wristband utilizes a light-based technique known as photoplethysmography to monitor blood flow and identify cardiac arrest events. It successfully detected 100% of ventricular fibrillation cases and 90% of pulseless ventricular tachycardia events among 59 shockable cardiac arrests recorded. The wristband's ability to automatically alert emergency services could significantly enhance survival rates, especially since many out-of-hospital cardiac arrests are unwitnessed. The study noted only nine false positives during the monitoring period, demonstrating the device's reliability. Despite its promising results, the research was conducted in a controlled clinical setting, and further studies are necessary to evaluate the wristband's performance in real-world situations. The ultimate goal is to integrate this technology with emergency response systems in the Netherlands.