Smartwatch and ring take on the 12-Lead ECG in heart rhythm showdown
NCT ID NCT05298553
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested whether two wearable devices—the Apple Watch and the Skylab CART-I ring—can accurately detect atrial fibrillation and other irregular heart rhythms compared to the standard 12-lead ECG. Researchers recruited 500 adults from UK cardiology clinics. Each participant wore both devices and had their heart rhythm recorded simultaneously with the standard test. The goal was to see if the wearables' single-lead ECGs and automatic detection algorithms could match the gold standard. If successful, these devices could make it easier to spot hidden heart rhythm problems without a clinic visit.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Apple Watch and Skylab CART-I ring (wearable single-lead ECG devices)
What this could lead to
If these wearables prove accurate, they could help catch hidden heart rhythm problems earlier, potentially preventing strokes.
What could go wrong
This is a completed diagnostic study, not a treatment trial. The devices may not be as reliable as the gold-standard 12-lead ECG, and results may not apply to all patients.
Disclaimer
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the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Oxford Univeristy Hospitals NHS Foundation Trust
Oxford, Oxfordshire, OX89DU, United Kingdom
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University Hospital Birmingham
Birmingham, United Kingdom
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University Hospital Southampton
Southampton, United Kingdom