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New MRI study seeks hidden stroke causes in rare blood disorder

NCT ID NCT05583305

Knowledge-focused Sponsor: Chinese University of Hong Kong 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 why people with antiphospholipid syndrome (APS) — a condition that raises blood clot risk — may have narrowed brain arteries. Researchers will use advanced MRI scans on 60 APS patients to check for artery narrowing and plaque buildup. The goal is to better understand stroke causes in APS beyond just blood clots.

What this could mean

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

What this could lead to
If successful, this could reveal new causes of stroke in antiphospholipid syndrome, pointing toward better prevention strategies.
What could go wrong
This is a small, observational study with only 60 participants. It aims to gather knowledge, not test a treatment, so direct patient benefits are not guaranteed.

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 60 people

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

Started

Oct 2022

Expected to finish

Jul 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

Adults with or without APS

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. Patients diagnosed with APS who fulfilled the modified Sapporo criteria: 1. at least one clinical criterion (vascular thrombosis or pregnancy morbidity); and 2. laboratory criteria (aPL positivity twice, 12 weeks apart): i. Lupus anticoagulant positivity requires screening, mixing, and confirmation test as per International Society of Thrombosis and Hemostasis guidelines (11). ii. Anticardiolipin antibodies positivity requires a medium to high titer IgG and/or IgM level by ELISA assays. iii. Anti-β2 glycoprotein antibodies positivity requires a \>99th titer IgG and/or IgM level by ELISA assays. 2. Patients age ≥18 years 3. Patients who are able to provide an informed consent to study procedures Exclusion Criteria: 1. Patient with established neurological disease, such as stroke, cerebral venous thrombosis, vasculitis of the central nervous system, cerebral lupus, etc. 2. Patient contraindicated to contrast MRI scans. E.g. claustrophobia, allergy to gadolinium contrast, MRI incompatible implants, estimated glomerular filtration rate of \< 30mL/min/1.73m2.

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Conditions

The condition(s) this trial relates to.

antiphospholipid syndrome cerebral artery stenosis Constriction, Pathologic

As listed by the trial registrant

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

Antiphospholipid syndrome Intracranial stenosis Stenosis

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

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    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

  • Chinese University of Hong Kong

    Hong Kong, Hong Kong

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