Could tailored blood thinner dosing prevent strokes in chinese patients?
NCT ID NCT05378035
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
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About 427 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Sep 2022
- Expected to finish
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Dec 2027
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.
Who is studied
Chinese nonvalvular atrial fibrillation patients on direct oral anticoagulants.
- Ages
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18 to 80 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.
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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.
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The places running it
1 site. 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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Chinese University of Hong Kong
RECRUITINGHong Kong, Hong Kong
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