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Does Samsung Galaxy Watch 4 Have ECG

Yes, the Galaxy Watch 4 has FDA-cleared ECG functionality for detecting atrial fibrillation and monitoring heart rhythm. Availability varies by region and requires a compatible Samsung Galaxy phone.

What ECG Detects​

  • Normal Sinus Rhythm: Regular, healthy heart rhythm
  • Atrial Fibrillation (AFib): Irregular heart rhythm that may require medical attention
  • Inconclusive: When measurement quality isn't sufficient for classification

Medical Clearances: FDA cleared (US), CE marked (EU), MFDS approved (South Korea)

How ECG Works​

The ECG uses electrodes in the watch case (wrist contact) and buttons (finger contact) to complete an electrical circuit and capture a 30-second waveform using Samsung's BioActive sensor technology.

  • To Take an ECG: Open Samsung Health Monitor app on watch, select ECG, rest arm on flat surface, place finger on top button, hold still for 30 seconds, and view results.

Requirements​

  • Watch: Galaxy Watch 4 or 4 Classic
  • Phone: Must be Samsung Galaxy phone with One UI 3.1+ (not compatible with other Android phones or iPhone)
  • App: Samsung Health Monitor from Galaxy Store
  • Region: Phone must be set to approved region (US, EU, UK, Canada, Australia, others)

Regional Availability​

Available: US, EU, UK, South Korea, Canada, Australia, Singapore, UAE, Hong Kong

Not Available: India, China, most of Africa, most of South America (pending regulatory approval)

Limitations​

ECG cannot detect heart attacks, diagnose all heart conditions, or replace doctor visits. It's a screening tool for AFib detection only. May produce false positives/negatives, and is less accurate during exercise or stress.

See Also: What is BioActive Sensor|Does It Work With iPhone|What Phones Are Compatible

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