Samsung watches can predict if you're about to faint - but there are big caveats

**Executive summary:** A ZDNET report covers a joint clinical study showing Samsung Galaxy Watch 6's PPG sensor plus an AI model can potentially predict vasovagal syncope up to five minutes before an event with 84.6% accuracy (90% sensitivity, 64% specificity); the article emphasizes limitations from the controlled tilt-table setting, risks of false positives and false reassurance, and calls for larger real-world validation before any consumer rollout.