Google AI spots high blood pressure from an ordinary smartwatch - no cuff needed
Google Research has published a Nature paper describing a neural network that detects signs of hypertension using only a smartwatch's existing pulse and motion sensors, trained on nearly 500,000 hours of sensor data without diagnoses to guide it. In a 196-person study across five US sites, the watch identified 65.8% of people with high blood pressure, versus 55.3% for a standard in-office cuff measurement. Google has folded the findings into the blood-pressure trends feature in its Google Health app, while stressing it remains research and not a diagnosis.
Why it matters: More than half of people with hypertension do not know they have it; passive screening on a device millions already wear could surface the condition years earlier - and it is a rare AI health result published in Nature and shipped to consumers in the same week.
Sources: Nature, The Decoder (7 Nov 2026)