Fitbit vs. hospital ECG: can a smartwatch save hearts?
NCT ID NCT06887387
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study is testing whether a Fitbit can accurately measure heart electrical activity (QT interval) in 80 adults with Long QT Syndrome, a condition that can cause dangerous heart rhythms. Participants will use a Fitbit to take weekly ECG readings at home, which will be compared to standard hospital ECGs. The goal is to see if wearable devices can reliably track heart health and help explain symptoms, potentially reducing the need for frequent clinic visits.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 80 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2025
- Expected to finish
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Sep 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Patients with a diagnosis of long QT syndrome
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Clinical diagnosis of Long QT Syndrome * Aged 18 years or over * Phone with iOS version 15 or Android OS 9.0 or higher * Able and willing to provide informed consent Exclusion Criteria: * Unwilling or unable to give consent * Ventricular pacing at recruitment * Bundle branch block or pre-excitation at baseline
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Barts and London Hospital NHS Trust
RECRUITINGLondon, United Kingdom
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