Clinical trial Recruiting at 63 sites Phase 3 Interventional Ages 18 and up

Evaluating anticoagulation for new atrial fibrillation after heart surgery

Official title: Anticoagulation for New-Onset Post-Operative Atrial Fibrillation After CABG

Run by Icahn School of Medicine at Mount Sinai · NCT04045665 · Data updated 2026-11-12

This study is testing if adding a blood thinner to regular heart medication can help patients who develop new atrial fibrillation after heart surgery, while also keeping an eye on any bleeding risks.

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment3200 (estimated)
SponsorIcahn School of Medicine at Mount Sinai
Academic / other
Locations106 sites (Little Rock, Arkansas and 105 other locations)
StatusRecruiting
StartedDecember 13, 2019
Main results expectedAugust 31, 2026
Study endsAugust 31, 2026
Registry record updatedJune 26, 2026
Trial IDNCT04045665 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older who have undergone isolated CABG and developed persistent or recurrent POAF.

Probably not a fit

Patients with a history of atrial fibrillation or those requiring long-term anticoagulation prior to surgery will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to assess the effectiveness and safety of adding oral anticoagulation (OAC) to standard antiplatelet therapy in patients who experience new-onset post-operative atrial fibrillation (POAF) following coronary artery bypass graft (CABG) surgery. It is a multicenter, open-label, randomized trial that compares outcomes between patients receiving OAC and those on antiplatelet therapy alone. The primary focus is on preventing thromboembolic events while monitoring for major bleeding complications over a 90-day period. Patients who decline randomization will be enrolled in a parallel registry to capture their treatment strategies and outcomes.

Why it matters

Potential benefit: If successful, this study could significantly reduce the risk of thromboembolic events in patients with new-onset POAF after CABG surgery.

How similar studies have gone: Previous studies have shown promise in using anticoagulation strategies for atrial fibrillation, but this specific approach in the post-operative setting is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients of age ≥18 years who undergo isolated CABG for coronary artery disease
* POAF that persists for \>60 minutes or is recurrent (more than one episode) within 7 days after the index CABG surgery

Exclusion Criteria:

* Clinical history of either permanent, persistent or paroxysmal atrial fibrillation
* Any pre-existing clinical indication for long-term OAC
* Any absolute contraindication to OAC
* Planned use of post-operative dual antiplatelet therapy (DAPT)

  a. This includes, but is not limited to, patients with recent PCI with drug-eluting or bare-metal stent.
* Cardiogenic shock
* Major perioperative complication\* occurring between CABG and randomization

  a. including, but not limited to, stroke, TIA, MI, major bleeding (BARC type 4 bleeding), severe sepsis, renal failure requiring dialysis, or need for reoperation due to bleeding (e.g. pericardial tamponade).
* Concomitant left atrial appendage closure during CABG
* Concomitant valve surgery during CABG or prior valve surgery (including aortic, mitral, tricuspid or pulmonary)
* Concomitant mitral valve annuloplasty during CABG
* Concomitant carotid artery endarterectomy during CABG
* Concomitant aortic root replacement during CABG
* Concomitant surgery for AF during CABG
* Liver cirrhosis or Child-Pugh Class C chronic liver disease
* Pharmacologic therapy with an investigational drug or device within 30-days prior to randomization or plan to enroll patient in an investigational drug or device trial during participation in this trial
* Pregnancy at the time of randomization
* Unable or unwilling to provide inform consent
* Unable or unwilling to comply with the study treatment and follow-up
* Existence of underlying disease that limits life expectancy to less than one year

Where it's running

  • CHI St. Vincent, Arkansas
    Little Rock, Arkansas, United States
    Recruiting
  • University of Southern California
    Los Angeles, California, United States
    Recruiting
  • Cedars-Sinai Medical Center
    Los Angeles, California, United States
    Recruiting
  • Stanford University
    Stanford, California, United States
    Recruiting
  • Yale Medicine
    New Haven, Connecticut, United States
    Recruiting
  • MedStar Washington Hospital Center
    Washington D.C., District of Columbia, United States
    Recruiting
Show 44 more locations
  • Emory University
    Atlanta, Georgia, United States
    Recruiting
  • Piedmont Healthcare Inc.
    Atlanta, Georgia, United States
    Recruiting
  • Ochsner Clinic
    New Orleans, Louisiana, United States
    Recruiting
  • Maine Medical Center
    Portland, Maine, United States
    Recruiting
  • University of Maryland
    Baltimore, Maryland, United States
    Recruiting
  • Johns Hopkins
    Baltimore, Maryland, United States
    Recruiting
  • Massachusetts General Hospital
    Boston, Massachusetts, United States
    Recruiting
  • Brigham and Women's Hospital
    Boston, Massachusetts, United States
    Recruiting
  • University of Michigan
    Ann Arbor, Michigan, United States
    Recruiting
  • Mayo Clinic
    Rochester, Minnesota, United States
    Recruiting
  • Mid America Health Institute
    Kansas City, Missouri, United States
    Recruiting
  • Washington University School of Medicine
    St Louis, Missouri, United States
    Recruiting
  • Dartmouth-Hitchcock Medical Center
    Lebanon, New Hampshire, United States
    Recruiting
  • Jersey Shore University Medical Center
    Neptune City, New Jersey, United States
    Recruiting
  • Northwell Health System
    Great Neck, New York, United States
    Recruiting
  • Columbia University Medical Center
    New York, New York, United States
    Recruiting
  • Montefiore Medical Center
    The Bronx, New York, United States
    Recruiting
  • Duke University
    Durham, North Carolina, United States
    Recruiting
  • East Carolina University
    Greenville, North Carolina, United States
    Recruiting
  • Cleveland Clinic Foundation
    Cleveland, Ohio, United States
    Recruiting
  • University of Pennsylvania
    Philadelphia, Pennsylvania, United States
    Recruiting
  • Baylor College of Medicine
    Houston, Texas, United States
    Recruiting
  • Michael E. DeBakey VA Medical Center
    Houston, Texas, United States
    Recruiting
  • Baylor Research Institute
    Plano, Texas, United States
    Recruiting
  • Intermountain CV Research
    Murray, Utah, United States
    Recruiting
  • University of Utah
    Salt Lake City, Utah, United States
    Recruiting
  • University of Vermont
    Burlington, Vermont, United States
    Recruiting
  • University of Virginia Health System
    Charlottesville, Virginia, United States
    Recruiting
  • West Virginia University
    Morgantown, West Virginia, United States
    Recruiting
  • University of Alberta Hospital
    Edmonton, Alberta, Canada
    Recruiting
  • London Health Sciences Centre
    London, Ontario, Canada
    Recruiting
  • Sunnybrook Hospital
    Toronto, Ontario, Canada
    Recruiting
  • Montreal Heart Institute
    Montreal, Quebec, Canada
    Recruiting
  • Centre Hospitalier de l'Université de Montréal
    Montreal, Quebec, Canada
    Recruiting
  • Hôpital Laval
    Québec, Canada
    Recruiting
  • Heart Center Leipzig
    Berlin, Brandenburg, Germany
    Recruiting
  • University Medical Center Jena
    Jena, Thuringia, Germany
    Recruiting
  • Kerckhoff Klinik, Bad Nauheim
    Bad Nauheim, Germany
    Recruiting
  • German Heart Center Berlin
    Berlin, Germany
    Recruiting
  • University Hospital Bonn
    Bonn, Germany
    Recruiting
  • Heinrich Heine University Düsseldorf
    Düsseldorf, Germany
    Recruiting
  • Frankfurt University Hospital
    Frankfurt, Germany
    Recruiting
  • Heart Center, University of Freiburg
    Freiburg im Breisgau, Germany
    Recruiting
  • University Medical Center Halle
    Halle, Germany
    Recruiting

+56 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.