Evaluating anticoagulants for stroke risk in atrial fibrillation patients

The Efficacy and Safety of Non-vItamiN K antaGonist oraL Anticoagulants for intermEdiate Stroke Risk in Patients With Atrial Fibrillation (SINGLE-AF)

Phase 4 Interventional Yonsei University · NCT04437654

This study is testing if new blood thinners can help people with atrial fibrillation and a moderate risk of stroke stay safe and healthy.

Quick facts

PhasePhase 4
Study typeInterventional
Enrollment1800 (estimated)
Ages19 Years to 80 Years
SexAll
SponsorYonsei University Academic / other
Locations1 site (Seoul)
Trial IDNCT04437654 on ClinicalTrials.gov

What this trial studies

This study investigates the efficacy and safety of non-vitamin K antagonist oral anticoagulants (NOACs) in patients with atrial fibrillation who have an intermediate risk of stroke, as determined by their CHA2DS2-VASc score. It aims to assess major safety outcomes such as bleeding events and major efficacy outcomes including strokes and cardiovascular mortality. Additional outcomes will include hospitalization rates, drug compliance, quality of life, cognitive function, and physical strength. The study will involve patients aged 19 to 80 who meet specific inclusion criteria and agree to participate.

Who should consider this trial

Good fit: Ideal candidates are patients aged 19 to 80 with nonvalvular atrial fibrillation and a CHA2DS2-VASc score of 1 for males or 2 for females.

Not a fit: Patients with severe liver or kidney dysfunction, thyroid issues, or those with a predicted survival of less than 12 months may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a safer and more effective anticoagulation option for patients with atrial fibrillation at intermediate stroke risk.

How similar studies have performed: Other studies have shown promising results with similar approaches using NOACs in atrial fibrillation patients, indicating potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age: 19\~80 years old
* CHA2DS2-VASc score 1 for male or 2 for female among nonvalvular atrial fibrillation patients
* Patients who agree to register for this study
* Patients who can be observed for the progress after treatment

Exclusion Criteria:

* Severe liver or kidney dysfunction
* Thyroid dysfunction
* Pregnant or breastfeeding women
* Malignant tumors that have not been completely cured
* Severe structural heart disease
* Predicted survival is less than 12 months
* Patients who do not understand the content of the study or disagree with it

Where this trial is running

Seoul

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Atrial Fibrillation Patients With Intermediate Stroke RiskAtrial fibrillationanticoagulationintermediate stroke riskefficacysafety
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.