Smartwatch AI shows hypertension-screening potential

Google Research described an AI system that combines optical pulse and motion signals collected over several days to detect signs of hypertension without cuff calibration. A prospective study of 196 participants reported 65.8% sensitivity and 90.0% specificity for initial screening against 24-hour ambulatory monitoring.

Why it matters: Passive screening could prompt earlier assessment. This is early feasibility research, not a replacement for clinical arm cuffs or a definitive diagnosis; the study excluded people taking blood-pressure medication.