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Can a sleep machine tame a fluttering heart?

NCT ID NCT04513483

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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether using a CPAP machine at night can reduce episodes of atrial fibrillation (a type of irregular heartbeat) in people who also have obstructive sleep apnea. Twenty-five adults with both conditions were enrolled. Half used CPAP while the other half were observed. The goal was to see if CPAP lowers the time spent in AFib and improves quality of life.

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 successful, CPAP could become a standard add-on treatment to help control atrial fibrillation in patients with sleep apnea.
What could go wrong
This is a very small, early-stage study with only 25 participants. Results may not apply to everyone, and CPAP may not significantly reduce AF burden.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

25 people

The number who actually took part.

Started

Aug 2020

Finished

Aug 2025

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.

Ages

18 to 80 years

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. men or women aged 18 to 80 years 2. paroxysmal AF, diagnosed based on the ACC/AHA/HRS 2014 guideline, and is defined as AF that terminates spontaneously or with intervention within 7 d of onset either by 12-lead EKG, 24-hr Holter, or 14-day ECG monitor. 3. OSA, defined as an AHI\>15/hr of sleep, of which \>50% of events are obstructive. 4. Informed consent signed Exclusion Criteria: 1. Moderate-severe valvular heart diseases (regurgitation or stenosis) 2. post heart surgery 3. Uncontrolled systemic hypertension or pulmonary hypertension 4. Use of psychoactive or other drugs that could influence breathing patterns 5. Current use of CPAP treatment 6. Epworth sleepiness scale\>10 7. Congestive heart failure (LVEF≦45%) 8. Chronic obstructive pulmonary disease 9. History of stroke or neuromuscular disease 10. Severe insomnia

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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

Locations

  • National Taiwan University Hospital

    Taipei, Taiwan

More trials for these conditions

Other studies related to the condition(s) this trial covers.