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Your phone's camera might spot a hidden heart rhythm problem

NCT ID NCT07779213

Diagnosis Sponsor: Happitech BV Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 21, 2026 · Last updated Aug 21, 2026

Summary

This trial tests whether a smartphone app using the camera's light sensor can detect atrial fibrillation (AF), a common heart rhythm disorder that raises stroke risk. About 554 adults with heart conditions will have their heart rhythm measured simultaneously by a standard 12-lead ECG and the phone's photoplethysmography (PPG) technology. The goal is to see how accurately the phone-based algorithm identifies AF compared to the gold-standard ECG. If it works, this could make AF screening as simple as holding a phone.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Smartphone-based photoplethysmography (PPG) using the Heart Rhythm Software algorithm
What this could lead to
If successful, this could enable convenient, widespread screening for atrial fibrillation using just a smartphone camera, potentially catching undiagnosed cases early.
What could go wrong
The trial is relatively small and early-stage, and accuracy may vary across different skin tones, ages, or phone models. It is not yet proven to replace standard ECG diagnosis.

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

Study facts

What this study's own registry entry says, in plain language.

Participants

About 554 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2026

Expected to finish

Nov 2026

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Male and female patients aged 22 years or older who are cardiology patients consulting the cardiac outpatient clinic, 50% of whom have a rhythm of atrial fibrillation at the time of enrollment, and own a smartphone.

Ages

22 minutes and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Adults aged 22 years or older 2. Owns a smartphone and knows how to operate and navigate different applications. 3. Individuals able to read, understand, and sign the consent form. 4. Cardiology patients consulting the cardiac outpatient clinic. 5. History of persistent AF or other cardiac rhythm Exclusion Criteria: 1. Participants with cognitive impairments 2. Individuals who cannot read, speak, and/or understand English 3. Patients with implantable neurostimulators, cardiac implantable device in an atrial or ventricular paced rhythm documented on a 12-lead ECG during the initial study visit

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Conditions

The condition(s) this trial relates to.

atrial fibrillation

As listed by the trial registrant

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

Atrial fibrillation (AF)

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    5 sites in 2 countries. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • CardioVascular Health Clinic

    RECRUITING

    Oklahoma City, Oklahoma, 73134, United States

  • Isala Zwolle

    RECRUITING

    Zwolle, Overijssel, 8025 AB, Netherlands

  • Nair Research, LLC dba Arrhythmia Research Group LLC

    RECRUITING

    Jonesboro, Arkansas, 72401, United States

  • South Denver Cardiology

    RECRUITING

    Littleton, Colorado, 80210, United States

  • Tulane University

    NOT_YET_RECRUITING

    New Orleans, Louisiana, 70112, United States

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