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Could tailored blood thinner dosing prevent strokes in chinese patients?

NCT ID NCT05378035

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 30, 2026 · Last updated Jul 31, 2026 · Updated 1 time

Summary

This study looks at how blood levels of common blood thinners (apixaban, dabigatran, edoxaban, and rivaroxaban) change over time in Chinese patients with atrial fibrillation. Researchers will take blood samples before and after stopping the medication for medical procedures. The goal is to understand why some patients may have higher risks of stroke or bleeding and to guide safer, more personalized treatment.

What this could mean

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

Active substance
blood tests to measure levels of direct oral anticoagulants (apixaban, dabigatran, edoxaban, rivaroxaban)
What this could lead to
If successful, this could lead to safer, more personalized dosing of blood thinners for Chinese patients with atrial fibrillation, reducing the risk of strokes and bleeding.
What could go wrong
This is an observational study, not a treatment trial, so it will not directly test a new therapy. The findings may not apply to other ethnic groups or all patients.

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 427 people

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

Started

Sep 2022

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

Chinese nonvalvular atrial fibrillation patients on direct oral anticoagulants.

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: * Chinese nonvalvular atrial fibrillation (NVAF) patients on apixaban, dabigatran, edoxaban, or rivaroxaban for 6 months or more. * Patients aged 18-80 years old. * Patients who are able to provide an informed consent. * Patients who are indicated for elective medical procedures that require interruption of direct oral anticoagulants (DOAC) for 48 hours. Exclusion Criteria: * Patients who developed thromboembolism (e.g. ischemic stroke, ischemic bowel, etc.) or major systemic bleeding (e.g. intracerebral haemorrhage, gastrointestinal bleeding) during DOAC usage. * Patients with creatinine clearance by Cockroft-Gault formula ≤ 30 mL/min. * Patients with inappropriate DOAC dosages with respect to age, body weight, and creatinine clearance. * Patients who receive DOAC with indications other than NVAF, such as history of mitral stenosis, metallic heart valve, thrombophilia, venous thromboembolism, etc. * Patients with conditions that alter haemostasis besides DOAC use, such as essential thrombocytosis, hepatic congestion, hepatic failure with coagulopathy, etc.

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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.

  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

  • Chinese University of Hong Kong

    RECRUITING

    Hong Kong, Hong Kong

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