Clinical trial NCT02889562: Apixaban Versus Warfarin for the Management of Post-operative Atrial Fibrillation
Official title: Apixaban Versus Warfarin for the Management of Post-operative Atrial Fibrillation: a Prospective, Controlled, Randomized Pilot Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
PHASE3
Conditions: Coronary Artery Bypass Grafting
Postoperative Atrial Fibrilation
Stroke
Systemic Embolism
Deep Venous Thrombosis
Keywords: apixaban
anticoagulant
CABG
thrombosis
fibrillation
Lead sponsor: Sanford Health
Sponsor class: OTHER
Collaborators: name: Bristol-Myers Squibb
First posted: 2016-09-05
Enrollment: 56
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: In this open-label, prospective, randomized pilot study, patients who develop atrial fibrillation after isolated coronary artery bypass grafting surgery will be identified. Patients with persistent atrial fibrillation (\>12 hours) or recurrent sustained atrial fibrillation (\>2 episodes of atrial fibrillation lasting longer than 30 minutes) will be candidates for inclusion. Upon meeting study inclusion and exclusion criteria, and after informed consent, patients will be randomized to either the standard of care (warfarin per protocol) or apixaban arms of the trial. Routine postoperative care after CABG will occur in both groups. Upon discharge, anticoagulation in both groups will be managed by the anticoagulation clinic. Patients will be followed for 30 days after surgery.


Eligibility criteria: Inclusion Criteria:

* Signed Written Informed Consent
* Patients diagnosed with new-onset persistent or recurrent atrial fibrillation after isolated CABG surgery. Persistent atrial fibrillation is defined as an episode of \>12 hours. Recurrent atrial fibrillation is defined as two or more episodes of atrial fibrillation lasting longer than 30 minutes.
* Women of childbearing potential (WOCBP) must have a negative serum or urine pregnancy test (minimum sensitivity 25 IU/L or equivalent units of HCG) within 24 hours prior to the start of study drug. Patients undergoing isolated CABG must have this tested and documented prior to the procedure, and this will be verified prior to randomization.
* Women must not be breastfeeding.
* WOCBP must agree to follow instructions for method(s) of contraception for the duration of treatment with study drug(s): 30 days of treatment plus 5 half-lives of study drug Apixaban (3 days) or warfarin (8 days) plus 30 days (duration of ovulatory cycle) for a total of 38 days post-treatment completion.
* Males who are sexually active with WOCBP must agree to follow instructions for method(s) of contraception for the duration of treatment with study drug(s): 30 days of treatment plus 5 half-lives of study drug Apixaban (3 days) or warfarin (8 days) plus 90 days (duration of sperm turnover) for a total of 98 days post-treatment completion.

Exclusion Criteria:

* Atrial fibrillation due to a reversible cause other than recent surgery
* Patients diagnosed with persistent or paroxysmal atrial fibrillation chronically before undergoing surgery
* Patients with mechanical heart valves
* Patients currently experiencing active bleeding precluding initialization of anticoagulation therapy in the opinion of their managing physician, or with increased bleeding risk (as determined by the attending surgeon) believed to be a contraindication to anticoagulation at the time of randomization Planned major surgery requiring stoppage of anticoagulation therapy during trial period
* Stroke within the previous 7 days
* Moderate or severe mitral stenosis
* Conditions other than atrial fibrillation that required anticoagulation (prosthetic mechanical heart valve)
* Patients taking warfarin, apixaban, rivaroxaban, dabigatran, edoxaban, clopidogrel, ticagrelor, or enoxaparin at home for any indication in the 15 days prior to surgery
* Patients requiring the use of clopidogrel or ticagrelor during the study period
* Severe renal insufficiency (serum creatinine level of \>2.5 mg/dL or CrCL\<25 ml/min) for consecutive measurements
* Allergies to warfarin or apixaban, or components of warfarin or apixaban

Primary outcomes:
measure: Number of Participants With Strokes
timeFrame: 30 days
measure: Number of Participants With Thromboembolytic Events
timeFrame: 30 days
Secondary outcomes:
measure: Units of Blood Given After Initiation of Anticoagulation Medication
timeFrame: 30 days
measure: Total Post-operative Length of Stay
timeFrame: 30 days
measure: Time in Therapeutic Range of INR, if on Warfarin
timeFrame: 30 days
Other outcomes:
Locations:
city: Fargo
country: United States
facility: Sanford Health
state: North Dakota
Study officials:
affiliation: Sanford Health
name: Cornelius Dyke, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Anderson E, Johnke K, Leedahl D, Glogoza M, Newman R, Dyke C. Novel oral anticoagulants vs warfarin for the management of postoperative atrial fibrillation: clinical outcomes and cost analysis. Am J Surg. 2015 Dec;210(6):1095-102; discussion 1102-3. doi: 10.1016/j.amjsurg.2015.07.005. Epub 2015 Sep 18.
citation: Schulman S, Angeras U, Bergqvist D, Eriksson B, Lassen MR, Fisher W; Subcommittee on Control of Anticoagulation of the Scientific and Standardization Committee of the International Society on Thrombosis and Haemostasis. Definition of major bleeding in clinical investigations of antihemostatic medicinal products in surgical patients. J Thromb Haemost. 2010 Jan;8(1):202-4. doi: 10.1111/j.1538-7836.2009.03678.x. Epub 2009 Oct 30.
citation: Piccini JP, Zhao Y, Steinberg BA, He X, Mathew JP, Fullerton DA, Hegland DD, Hernandez AF, Mills RM, Klaskala W, Peterson ED. Comparative effectiveness of pharmacotherapies for prevention of atrial fibrillation following coronary artery bypass surgery. Am J Cardiol. 2013 Oct 1;112(7):954-60. doi: 10.1016/j.amjcard.2013.05.029. Epub 2013 Jul 11.
citation: Lahiri MK, Fang K, Lamerato L, Khan AM, Schuger CD. Effect of race on the frequency of postoperative atrial fibrillation following coronary artery bypass grafting. Am J Cardiol. 2011 Feb 1;107(3):383-6. doi: 10.1016/j.amjcard.2010.09.032.
citation: Rostagno C, La Meir M, Gelsomino S, Ghilli L, Rossi A, Carone E, Braconi L, Rosso G, Puggelli F, Mattesini A, Stefano PL, Padeletti L, Maessen J, Gensini GF. Atrial fibrillation after cardiac surgery: incidence, risk factors, and economic burden. J Cardiothorac Vasc Anesth. 2010 Dec;24(6):952-8. doi: 10.1053/j.jvca.2010.03.009. Epub 2010 May 31.
citation: Raiten JM, Ghadimi K, Augoustides JG, Ramakrishna H, Patel PA, Weiss SJ, Gutsche JT. Atrial fibrillation after cardiac surgery: clinical update on mechanisms and prophylactic strategies. J Cardiothorac Vasc Anesth. 2015;29(3):806-16. doi: 10.1053/j.jvca.2015.01.001. No abstract available.
citation: Fuster V, Ryden LE, Asinger RW, Cannom DS, Crijns HJ, Frye RL, Halperin JL, Kay GN, Klein WW, Levy S, McNamara RL, Prystowsky EN, Wann LS, Wyse DG, Gibbons RJ, Antman EM, Alpert JS, Faxon DP, Fuster V, Gregoratos G, Hiratzka LF, Jacobs AK, Russell RO, Smith SC Jr, Klein WW, Alonso-Garcia A, Blomstrom-Lundqvist C, de Backer G, Flather M, Hradec J, Oto A, Parkhomenko A, Silber S, Torbicki A; American College of Cardiology/American Heart Association Task Force on Practice Guidelines; European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to Develop Guidelines for the Management of Patients With Atrial Fibrillation); North American Society of Pacing and Electrophysiology. ACC/AHA/ESC Guidelines for the Management of Patients With Atrial Fibrillation: Executive Summary A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and the European Society of Cardiology Committee for Practice Guidelines and Policy Conferences (Committee to Develop Guidelines for the Management of Patients With Atrial Fibrillation) Developed in Collaboration With the North American Society of Pacing and Electrophysiology. Circulation. 2001 Oct 23;104(17):2118-50. No abstract available.
citation: Granger CB, Alexander JH, McMurray JJ, Lopes RD, Hylek EM, Hanna M, Al-Khalidi HR, Ansell J, Atar D, Avezum A, Bahit MC, Diaz R, Easton JD, Ezekowitz JA, Flaker G, Garcia D, Geraldes M, Gersh BJ, Golitsyn S, Goto S, Hermosillo AG, Hohnloser SH, Horowitz J, Mohan P, Jansky P, Lewis BS, Lopez-Sendon JL, Pais P, Parkhomenko A, Verheugt FW, Zhu J, Wallentin L; ARISTOTLE Committees and Investigators. Apixaban versus warfarin in patients with atrial fibrillation. N Engl J Med. 2011 Sep 15;365(11):981-92. doi: 10.1056/NEJMoa1107039. Epub 2011 Aug 27.
citation: Connolly SJ, Ezekowitz MD, Yusuf S, Eikelboom J, Oldgren J, Parekh A, Pogue J, Reilly PA, Themeles E, Varrone J, Wang S, Alings M, Xavier D, Zhu J, Diaz R, Lewis BS, Darius H, Diener HC, Joyner CD, Wallentin L; RE-LY Steering Committee and Investigators. Dabigatran versus warfarin in patients with atrial fibrillation. N Engl J Med. 2009 Sep 17;361(12):1139-51. doi: 10.1056/NEJMoa0905561. Epub 2009 Aug 30.
citation: Patel MR, Mahaffey KW, Garg J, Pan G, Singer DE, Hacke W, Breithardt G, Halperin JL, Hankey GJ, Piccini JP, Becker RC, Nessel CC, Paolini JF, Berkowitz SD, Fox KA, Califf RM; ROCKET AF Investigators. Rivaroxaban versus warfarin in nonvalvular atrial fibrillation. N Engl J Med. 2011 Sep 8;365(10):883-91. doi: 10.1056/NEJMoa1009638. Epub 2011 Aug 10.
citation: Chapin TW, Leedahl DD, Brown AB, Pasek AM, Sand MG, Loy ML, Dyke CM. Comparison of Anticoagulants for Postoperative Atrial Fibrillation After Coronary Artery Bypass Grafting: A Pilot Study. J Cardiovasc Pharmacol Ther. 2020 Nov;25(6):523-530. doi: 10.1177/1074248420929483. Epub 2020 Jun 1.