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Sleep apnea device may keep heart rhythm in check

NCT ID NCT07358429

Disease control Sponsor: Medical University of Sofia Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at whether using a CPAP machine at night can reduce the chance of atrial fibrillation (an irregular heartbeat) returning in people who have both sleep apnea and a history of AF. Researchers will follow 91 adults for 12 months, tracking how often they use CPAP and checking for AF recurrence with ECG and Holter monitors.

What this could mean

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

Active substance
Continuous Positive Airway Pressure (CPAP) device
What this could lead to
If CPAP adherence reduces AF recurrence, it could point to a simple way to manage heart rhythm problems in sleep apnea patients.
What could go wrong
This is an observational study, not a randomized trial, so results may be less definitive. CPAP adherence varies, and the small size (91 people) limits how much we can conclude.

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

91 people

The number who actually took part.

Started

Sep 2024

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

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

Adult patients diagnosed with moderate-to-severe obstructive sleep apnea and a history of paroxysmal atrial fibrillation, managed in outpatient and hospital settings, and treated with continuous positive airway pressure therapy as part of routine clinical care.

Ages

18 years 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. Age ≥ 18 years 2. Diagnosed moderate-to-severe OSA 3. History of paroxysmal atrial fibrillation 4. Ability to initiate CPAP therapy 5. Written informed consent - Exclusion Criteria: 1. Left ventricular ejection fraction \< 50% 2. Permanent atrial fibrillation 3. Central sleep apnea 4. End-stage chronic kidney disease 5. Inability to obtain or tolerate CPAP therapy -

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Conditions

The condition(s) this trial relates to.

atrial fibrillation obstructive sleep apnea syndrome paroxysmal atrial fibrillation sleep apnea syndrome

As listed by the trial registrant

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

Atrial fibrillation (paroxysmal) Obstructive sleep apnea (OSA)

Contacts and locations

Locations

  • UMHAT "Tcaritca Joanna - ISUL"

    Sofia, 1000, Bulgaria

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