Anticoagulation + Antiplatelet Therapy for Post-Operative Atrial Fibrillation

(PACES Trial)

Recruiting at 94 trial locations

Overseen By Ellen Moquete, RN

Age: 18+

Sex: Any

Travel: May Be Covered

Time Reimbursement: Varies

Trial Phase: Phase 3

Recruiting

Sponsor: Icahn School of Medicine at Mount Sinai

Must not be taking: Dual antiplatelets

Disqualifiers: Permanent AF, Cardiogenic shock, Liver cirrhosis, others

No Placebo Group

Pivotal Trial (Near Approval)

Prior Safety Data

Approved in 2 Jurisdictions

Trial Summary

What is the purpose of this trial?

The primary objective of this study is to evaluate the effectiveness (prevention of thromboembolic events) and safety (major bleeding) of adding oral anticoagulation (OAC) to background antiplatelet therapy in patients who develop new-onset post-operative atrial fibrillation (POAF) after isolated coronary artery bypass graft (CABG) surgery. All patients with a qualifying POAF event, who decline randomization, will be offered the option of enrollment in a parallel registry that captures their baseline risk profile and their treatment strategy in terms of anticoagulants or antiplatelets received. These patients will also be asked to fill out a brief decliner survey.

Will I have to stop taking my current medications?

The trial information does not specify if you need to stop taking your current medications. However, if you are on dual antiplatelet therapy (DAPT) or have a pre-existing need for long-term oral anticoagulation, you may not be eligible to participate.

What data supports the effectiveness of the drug Apixaban (Eliquis) for post-operative atrial fibrillation?

Apixaban has been shown to be effective in preventing stroke in patients with atrial fibrillation and in preventing blood clots after hip or knee replacement surgery. It is generally well tolerated and has a lower risk of major bleeding compared to some other anticoagulants. ^{1 2 3 4 5}

Is the combination of anticoagulation and antiplatelet therapy safe for humans?

Apixaban, a component of the therapy, is generally well tolerated and has been shown to have a lower risk of major bleeding compared to some other treatments in large clinical trials for conditions like venous thromboembolism. It is considered a safe option for preventing blood clots after surgeries like hip or knee replacement. ^{1 2 3 5 6}

How does the drug Apixaban differ from other treatments for post-operative atrial fibrillation?

Apixaban is unique because it is an oral medication that directly inhibits factor Xa, a key protein in the blood clotting process, and it does not require routine blood monitoring like some other anticoagulants. This makes it a convenient option for preventing blood clots in patients with atrial fibrillation after surgery. ^{1 2 3 6 7}

Research Team

Annetine C Gelijns, PhD

Principal Investigator

Icahn School of Medicine at Mount Sinai

Marc Gillinov, MD

Principal Investigator

The Cleveland Clinic

John Alexander, MD

Principal Investigator

Duke University

Eligibility Criteria

This trial is for adults (≥18 years) who develop new, persistent or recurrent atrial fibrillation within 7 days after having a coronary artery bypass graft surgery. It's not for those with valve surgeries, major complications like stroke or bleeding post-surgery, pregnant women, people unable to consent or follow the study plan, those with less than one year life expectancy due to other diseases, prior history of atrial fibrillation, indications for long-term anticoagulation therapy outside of this condition, severe liver disease or recent participation in another drug/device trial.

Inclusion Criteria

I am 18 or older and had bypass surgery for heart disease.

My heart rhythm issue lasted over an hour or happened again within a week after my bypass surgery.

Exclusion Criteria

I am having a procedure to repair my heart valve at the same time as my bypass surgery.

I haven't used any experimental drugs or devices in the last 30 days.

My doctor expects I have less than a year to live due to my condition.

Trial Timeline

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Treatment

Participants receive either an OAC-based strategy or an antiplatelet-only strategy for 90 days

90 days

Study follow-up visits at 90 days, phone follow-up at 30, 60, and 180 days

Follow-up

Participants are monitored for safety and effectiveness after treatment, including assessment of thromboembolic and bleeding events

180 days

Phone follow-up at 180 days

Registry and Digital Health Substudy

Participants who decline randomization are enrolled in a registry; up to 500 participants may use a wearable heart rhythm monitor for 30 days post-discharge

30 days for digital health substudy

Treatment Details

Interventions

• Antiplatelet-only strategy (Antiplatelet agent)
• Oral Anticoagulant (Anticoagulant)

Trial Overview The study tests if adding oral anticoagulants to standard antiplatelet therapy is more effective and safe in preventing blood clots and reducing major bleeding risks in patients who have developed atrial fibrillation after coronary artery bypass surgery. Participants are either given just antiplatelets or a combination of antiplatelets and oral anticoagulants.

Participant Groups

Group I: Antiplatelet Therapy Active Control 1 Intervention

Antiplatelet-only strategy

Group II: Oral Anticoagulant Active Control 1 Intervention

OAC-based strategy

Who Is Running the Clinical Trial?

Icahn School of Medicine at Mount Sinai

Lead Sponsor

Trials

933

Recruited

579,000+

National Heart, Lung, and Blood Institute (NHLBI)

Collaborator

Trials

3,987

Recruited

47,860,000+

Vanderbilt University Medical Center

Collaborator

Trials

922

Recruited

939,000+

Findings from Research

Apixaban, an oral direct factor Xa inhibitor, has been approved in the EU for preventing venous thromboembolism (VTE) after hip or knee replacement surgeries, demonstrating its efficacy in reducing the risk of blood clots in these patients.

The drug is also undergoing phase III trials for preventing strokes in patients with atrial fibrillation, indicating its potential for broader applications in thrombotic disorders, although development for acute coronary syndromes has been halted.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Apixaban: first global approval. Watson, J., Whiteside, G., Perry, C.[2021]

Apixaban is an effective oral anticoagulant for treating and preventing venous thromboembolism (VTE), showing noninferiority to the traditional enoxaparin/warfarin treatment in large phase III trials over 6 months.

It has a lower risk of major bleeding compared to enoxaparin/warfarin and is well tolerated, making it a safer alternative for patients with VTE.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Apixaban: A Review in Venous Thromboembolism. Greig, SL., Garnock-Jones, KP.[2020]

Apixaban is an effective oral medication for preventing venous thromboembolism (VTE) after knee or hip replacement surgery, showing better efficacy than subcutaneous enoxaparin sodium in phase III trials ADVANCE-2 and -3 without significantly increasing bleeding risk.

While apixaban did not meet noninferiority criteria compared to a specific enoxaparin regimen in the ADVANCE-1 trial, it was associated with fewer bleeding complications, suggesting it may be a safer option for thromboprophylaxis.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Apixaban: a review of its use in the prevention of venous thromboembolism after knee or hip replacement surgery. Deeks, ED.[2021]

Apixaban is a new oral anticoagulant that directly inhibits factor Xa, showing superior efficacy and safety in preventing strokes in patients with atrial fibrillation compared to traditional vitamin K antagonists like warfarin.

In large phase III trials, apixaban not only reduced the risk of stroke and systemic embolism but also had a favorable safety profile, making it a better option for patients at high risk of bleeding who cannot use vitamin K antagonists.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Apixaban in the prevention of stroke and systemic embolism in nonvalvular atrial fibrillation. Pujadas-Mestres, L., Escolar, G., Arellano-Rodrigo, E., et al.[2017]

A reliable and sensitive method was developed to measure apixaban and its major metabolite in human plasma, which is crucial for clinical testing and monitoring of this anticoagulant drug.

The method showed excellent precision and accuracy, with low limits of quantification, making it effective for supporting clinical studies involving apixaban.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

LC-MS/MS determination of apixaban (BMS-562247) and its major metabolite in human plasma: an application of polarity switching and monolithic HPLC column. Pursley, J., Shen, JX., Schuster, A., et al.[2022]

Healthcare professionals (HCPs) and patients demonstrated satisfactory knowledge of bleeding risks associated with apixaban, with 96.1% of HCPs recognizing symptoms that require immediate attention and 71.2% of patients identifying abnormal bleeding as a significant side effect.

The study found that a significant majority of HCPs (97.8%) who received the Prescriber Guide utilized it in patient discussions, and 90.9% of patients who received the Patient Alert Card read it at least once, indicating effective distribution and utilization of these educational materials.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Evaluating the Effectiveness of Apixaban Additional Risk Minimisation Measures Using Surveys in Europe. Mayall, S., Kahlon, R., Al-Dakkak, I., et al.[2021]

Oral anticoagulant therapy, including both vitamin K antagonists and novel oral anticoagulants, is essential for preventing thromboembolic events in patients with atrial fibrillation, with a positive net clinical benefit in nearly all cases due to the balance of thrombosis prevention and bleeding risk.

The review highlights the complexities of managing anticoagulant therapy in various clinical situations, such as urgent surgeries or acute strokes, emphasizing the need for clear guidelines on when to modify or resume anticoagulation therapy.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Anticoagulation management in nonvalvular atrial fibrillation: current and future directions. Kornej, J., Potpara, T., Lip, GY.[2019]

References

1. New Zealand pubmed.ncbi.nlm.nih.gov

Apixaban: first global approval. [2021]

2. New Zealand pubmed.ncbi.nlm.nih.gov

Apixaban: A Review in Venous Thromboembolism. [2020]

3. New Zealand pubmed.ncbi.nlm.nih.gov

Apixaban: a review of its use in the prevention of venous thromboembolism after knee or hip replacement surgery. [2021]

4. Spain pubmed.ncbi.nlm.nih.gov

Apixaban in the prevention of stroke and systemic embolism in nonvalvular atrial fibrillation. [2017]

5. England pubmed.ncbi.nlm.nih.gov

LC-MS/MS determination of apixaban (BMS-562247) and its major metabolite in human plasma: an application of polarity switching and monolithic HPLC column. [2022]

6. New Zealand pubmed.ncbi.nlm.nih.gov

Evaluating the Effectiveness of Apixaban Additional Risk Minimisation Measures Using Surveys in Europe. [2021]

7. Poland pubmed.ncbi.nlm.nih.gov

Anticoagulation management in nonvalvular atrial fibrillation: current and future directions. [2019]