Can a sleep machine stop heart rhythm problems after ablation?
NCT ID NCT07444372
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether using a CPAP machine for sleep apnea after a heart procedure (catheter ablation) can help prevent atrial fibrillation from coming back. About 658 adults with both conditions will be randomly assigned to use CPAP for a year or receive usual care. The goal is to see if CPAP reduces the chance of irregular heart rhythms.
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 it works, this could provide a clear way to lower the chance of atrial fibrillation returning after ablation in people with sleep apnea.
- What could go wrong
- Previous small trials have not shown a clear benefit, possibly because patients didn't use the CPAP enough. This trial is still recruiting, and results may not apply to everyone.
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
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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
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About 658 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2026
- Expected to finish
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Jan 2029
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.
- Ages
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18 to 75 years
- 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.
Show the full entry requirements Hide 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: Patients must meet all of the following conditions to be eligible for the study: * Age 18-75 years. * Patients with persistent AF scheduled for first-time catheter ablation. * Diagnosed with OSA. * Able to tolerate CPAP therapy. * Capable of understanding and complying with the study protocol. * Willing to sign the informed consent form. Exclusion Criteria: Patients meeting any of the following criteria will be excluded from the study: * Secondary AF. * Left atrial anteroposterior diameter 60mm (measured via parasternal long-axis view). * Left ventricular ejection fraction \< 30%. * Comorbid moderate-to-severe mitral stenosis or history of prosthetic valve replacement (mechanical or bioprosthetic). * Pregnant or breastfeeding women. * History of myocardial infarction, percutaneous coronary intervention, or cardiac surgery within 3 months prior to screening. * History of stroke or transient ischemic attack within 6 months prior to screening. * Perioperative complications related to the ablation procedure occurring prior to randomization. * Inability to discontinue antiarrhythmic drugs (AADs) post-procedure due to other reasons. * Life expectancy \< 1 year. * Central sleep apnea. * Conditions requiring ventilatory support, including obesity hypoventilation syndrome (defined as BMI \> 30kg/m² and awake PaCO₂ \> 45mmHg), amyotrophic lateral sclerosis, or chronic obstructive pulmonary disease with \> 1 episode of respiratory failure or hypercapnia. * Treatment-emergent central sleep apnea during CPAP tolerance assessment that cannot be corrected prior to randomization. * Receipt of instrumental or surgical treatment for OSA within 3 months prior to screening, including CPAP, oral appliances, ENT surgery, or bariatric surgery. * Use of glucagon-like peptide-1 receptor agonists, glucose-dependent insulinotropic peptide receptor agonists, or glucagon receptor agonists for weight loss within 3 months prior to screening, or plans to initiate such medications within the next year. * Current participation in other drug or device trials.
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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
27 sites. 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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Beijing Anzhen Hospital
RECRUITINGBeijing, Beijing Municipality, 100029, China
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Beijing Chaoyang Hospital, Capital Medical University
NOT_YET_RECRUITINGBeijing, Beijing Municipality, 100020, China
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Beijing Hospital
NOT_YET_RECRUITINGBeijing, Beijing Municipality, 100730, China
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Beijing Jishuitan Hospital
NOT_YET_RECRUITINGBeijing, Beijing Municipality, 100035, China
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First Affiliated Hospital of China Medical University
NOT_YET_RECRUITINGShenyang, Liaoning, 110001, China
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First Affiliated Hospital of Dalian Medical University
NOT_YET_RECRUITINGDalian, Liaoning, 116011, China
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First Affiliated Hospital of Fujian Medical University
NOT_YET_RECRUITINGFuzhou, Fujian, 350004, China
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First Affiliated Hospital of Ningbo University
NOT_YET_RECRUITINGNingbo, Zhejiang, 315010, China
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Fujian Medical University Union Hospital
NOT_YET_RECRUITINGFuzhou, Fujian, 350001, China
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Langfang People's Hospital
NOT_YET_RECRUITINGLangfang, Hebei, 065000, China
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Linyi People's Hospital
NOT_YET_RECRUITINGLinyi, Shandong, 276003, China
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Peking University International Hospital
NOT_YET_RECRUITINGBeijing, Beijing Municipality, 102206, China
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People's Hospital of Guangxi Zhuang Autonomous Region
NOT_YET_RECRUITINGNanning, Guangxi, 530021, China
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Second Affiliated Hospital of Harbin Medical University
NOT_YET_RECRUITINGHarbin, Heilongjiang, 150086, China
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Second Hospital of Shanxi Medical University
NOT_YET_RECRUITINGTaiyuan, Shanxi, 030001, China
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Shengjing Hospital of China Medical University
NOT_YET_RECRUITINGShenyang, Liaoning, 110004, China
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Shengli Oilfield Central Hospital
NOT_YET_RECRUITINGDongying, Shandong, 257034, China
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Shijiazhuang Great Wall Hospital of Integrated Traditional Chinese and Western Medicine
NOT_YET_RECRUITINGShijiazhuang, Hebei, 050000, China
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The First Affiliated Hospital of Nanjing Medical University
NOT_YET_RECRUITINGNanjing, Jiangsu, 210029, China
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The First Affiliated Hospital of Zhengzhou University
NOT_YET_RECRUITINGZhengzhou, Henan, 450052, China
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The First Hospital of Jilin University
NOT_YET_RECRUITINGChangchun, Jilin, 130021, China
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The Ninth Hospital of Xingtai
NOT_YET_RECRUITINGXingtai, Hebei, 055250, China
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The Second Xiangya Hospital of Central South University
NOT_YET_RECRUITINGChangsha, Hunan, 410011, China
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Tianjin Chest Hospital
NOT_YET_RECRUITINGTianjin, Tianjin Municipality, 300222, China
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Wuhan Asia General Hospital
NOT_YET_RECRUITINGWuhan, Hubei, 430056, China
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Wuhan No. 1 Hospital
NOT_YET_RECRUITINGWuhan, Hubei, 430014, China
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Zhangzhou Hospital of Fujian Province
NOT_YET_RECRUITINGZhangzhou, Fujian, 363000, China
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a checklist and heart monitor stop repeat strokes?
- Does concentrating change your breathing? study probes Brain-Breath link in opioid users
- Can a breathing workout and walks help dialysis patients with irregular heartbeats?
- Can software read sleep studies as well as a specialist?
- Smart mask aims to measure blood oxygen through your face
- Zapping the ear: a new way to stop Post-Surgery heart rhythm problems?