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# iRhythm AI ECG Algorithm Cleared for Zio Watch
- URL: https://www.fdaweb.com/irhythm-ai-ecg-algorithm-cleared-for-zio-watch/
- Published: 2022-07-26T12:00:00.000Z
- Updated: 2026-09-14T17:53:28.000Z
- Author: David McFarland
- Tags: Devices, #legacy-id-D5152363

FDA has cleared an iRhythm Technologies 510(k) for its ZEUS (Zio ECG Utilization Software) System for the Zio Watch. The artificial intelligence algorithm allows the sensor-based watch to provide long-term continuous monitoring for atrial fibrillation (AFib). ZEUS is being produced in partnership with Verily, an Alphabet precision health company.

Verily separately has obtained 510(k) clearance for the Zio Watch (Study Watch with Irregular Pulse Monitor), iRhythm notes. The watch, which also characterizes the amount of AFib over time, uses a continuous photoplethysmography, AI-based algorithm to detect AFib and calculate an AFib burden estimate, iRhythm says, adding that a preliminary report is then sent to the patient’s clinician for review.