The U.S. FDA has cleared the first clinical grade watch for characterizing atrial fibrillation (afib), the most common type of heart arrhythmia in which the heart beats too slowly or irregularly. Developed by Verily, the health tech arm of Alphabet Inc., together with IRhythm Technologies Inc., the Zio Watch will leverage the ability of IRhythm’s Zeus system to diagnose cardiac arrhythmias by combining wearable biosensing with cloud-based data analytics and artificial intelligence.