Apple watch could spot hidden heart condition in seniors

NCT ID NCT05686330

Completed Diagnosis Sponsor: Amsterdam University Medical Centers (UMC), Location Academic Medical Center (AMC) Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tested whether an Apple Watch can detect atrial fibrillation (a heart rhythm problem) faster than usual methods in people aged 65 and older with high stroke risk. Over 400 participants wore the watch, which uses light sensors and an ECG to check heart rhythm. The goal was to see if the watch leads to quicker diagnosis and treatment.

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 with photoplethysmography (PPG) and ECG functions
What this could lead to: If successful, this could show that smartwatches help detect atrial fibrillation earlier in high-risk people, potentially preventing strokes.
What could go wrong: The trial is small and completed; results may not apply to everyone. Smartwatch detection may lead to false alarms or unnecessary worry.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Arrhythmias, Cardiac atrial fibrillation

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

ATRIAL FIBRILLATION

Contacts and locations

Locations

Cardiology Center of the Netherlands

Amsterdam, North Holland, Netherlands
Spaarne Gasthuis

Haarlem, North Holland, 2035 RC, Netherlands

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