Can your smartwatch replace a medical heart test? scientists put apple watch to the test
NCT ID NCT07663799
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study checks whether an Apple Watch Series 9 can accurately measure key health indicators—like oxygen levels and exercise capacity—in adults with heart conditions such as congenital heart disease, heart failure, or coronary artery disease. Participants wear the smartwatch during treadmill tests while medical-grade devices also record the same measurements. The goal is to see if consumer smartwatches are reliable enough for clinical use.
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 Series 9
What this could lead to
If accurate, smartwatches could help monitor heart disease progression at home, reducing clinic visits.
What could go wrong
This is a small, early validation study (20 participants) and may not prove accuracy for all patients or conditions.
Disclaimer
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the original study
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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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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Department of Medicine, Queen Mary Hospital
Hong Kong, Hong Kong
Contact Phone: •••-•••-•••• Email: •••••@•••••