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Nighttime breathing trouble linked to hidden heart damage

NCT ID NCT07315399

Knowledge-focused Sponsor: Beijing Anzhen Hospital 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how low oxygen levels during sleep (from obstructive sleep apnea) are connected to problems in the tiny blood vessels of the heart. Researchers will follow 560 adults with suspected heart issues to see if sleep apnea patterns can predict future heart events like heart attacks. The goal is to find better ways to identify heart risks early.

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 560 people

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

Expected to start

Dec 2025

An estimate. Start dates often move.

Expected to finish

Dec 2030

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

Suspected myocardial ischemia patients underwent PSG to acquire detailed parameters of OSA-related nocturnal hypoxemia.

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. Aged 18 to 80 years, of any gender. 2. Scheduled for elective coronary angiography due to symptoms or evidence of myocardial ischemia. 3. Agreed to and capable of completing overnight polysomnography (PSG) monitoring. 4. Provided written informed consent and were willing and able to comply with baseline assessments and long-term follow-up. Exclusion Criteria: 1. Presence of coronary chronic total occlusion (CTO), history of coronary artery bypass grafting (CABG), severe valvular heart disease, dilated or hypertrophic cardiomyopathy, congenital heart disease, or heart failure (NYHA functional class III-IV). 2. Sleep-disordered breathing with central sleep apnea (CSA) as the primary manifestation. 3. Severe hepatic insufficiency (Child-Pugh class C) or renal failure (eGFR \< 30 mL/min/1.73 m²). 4. Pregnancy or lactation. 5. Life expectancy of less than 2 years, or any other condition that the investigators considered unsuitable for participation in the study.

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Conditions

The condition(s) this trial relates to.

coronary artery disorder coronary microvascular disorder obstructive sleep apnea syndrome

As listed by the trial registrant

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

Coronary artery disease (CAD) Coronary microvascular dysfunction (CMD) OSA - obstructive sleep apnea

How to take part

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

  1. The places running it

    1 site. 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

  • Beijing Anzhen Hospital, Capital Medical University

    Beijing, China

More trials for these conditions

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