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Massive registry aims to uncover hidden risks of blood thinners in heart patients

NCT ID NCT04347187

Knowledge-focused Sponsor: National Medical Research Center for Cardiology, Ministry of Health of Russian Federation Source: ClinicalTrials.gov ↗

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This registry is tracking 2,000 people with atrial fibrillation who are taking blood thinners for a long time. The goal is to see how often serious bleeding or clotting events happen. Researchers will also look at genetic factors that might affect risk. This is an observational study, not a treatment trial.

What this could mean

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

Active substance
anticoagulants (blood thinners)
What this could lead to
If successful, this registry could help doctors better predict and prevent dangerous bleeding or clotting events in people with atrial fibrillation on long-term blood thinners.
What could go wrong
This is an observational registry, not a controlled trial, so it cannot prove cause and effect. Results may not apply to all patient groups.

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 2,000 people

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

Started

Jan 2015

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Hospitalized or outpatients with confirmed atrial fibrillation and CHA2DS2VASC \> 1

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: * Documented atrial fibrillation with CHA2DS2VASC \> 1 Exclusion Criteria: * Subjects who are unwilling or unable to provide informed consent. ACS within 12 months before inclusion Severe CHF (NYHA IV) Stroke within 6 months before inclusion Severe liver or muscle disease Severe kidney disease / renal failure with creatinine \> 3 mg/dl Conceivable impossibility to come in touch with the patient or his family at 1-year after the intervention

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Conditions

The condition(s) this trial relates to.

atrial fibrillation coronary artery disorder

As listed by the trial registrant

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

Atrial fibrillation

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

  • National Medical Research Center for Cardiology, Ministry of Health of Russian Federation

    RECRUITING

    Moscow, 121552, Russia

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