June Wan/ZDNET Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways Samsung's Galaxy Watch may predict fainting episodes. False alarms and missed warnings remain concerns. More real-world testing is still needed. Samsung wants you to know its smartwatch can do more than count your steps, track your sleep, and guilt you for not moving enough. The company has announced its Galaxy Watch may be able to predict a fainting episode or blackout before it happens. Samsung revealed this week that a joint clinical study with Chung-Ang University Gwangmyeong Hospital in Korea validated the Galaxy Watch 6's ability to predict vasovagal syncope, or VVS. The study used the device's photoplethysmography, or PPG, sensor to analyze heart rate variability data, then applied an AI algorithm to predict VVS during head-up tilt testing.…