Early vs Late Anticoagulation in Minor, Moderate, and Major Ischemic Stroke With Atrial Fibrillation

Author:

Goeldlin Martina B.1,Hakim Arsany2,Branca Mattia3,Abend Stefanie1,Kneihsl Markus1456,Valenzuela Pinilla Waldo7,Fenzl Sabine2,Rezny-Kasprzak Beata2,Rohner Roman2,Strbian Daniel8,Paciaroni Maurizio9,Thomalla Goetz10,Michel Patrik11,Nedeltchev Krassen112,Gattringer Thomas56,Sandset Else Charlotte13,Bonati Leo414,Aguiar de Sousa Diana1516,Sylaja P. N.17,Ntaios George18,Koga Masatoshi19,Gdovinova Zuzana2021,Lemmens Robin2223,Bornstein Natan M.24,Kelly Peter25,Katan Mira4,Horvath Thomas1,Dawson Jesse26,Fischer Urs14, ,Adeyemi Adedolapo Kamaldee27,Vedamurthy Adhiyaman27,Scutelnic Adrian27,Hisanao Akiyama27,Wilson Alastair27,Tarnutzer Alexander Andrea27,Pichler Alexander27,Salerno Alexander27,Vanhoorne Alexander27,Polymeris Alexandros27,Wilkinson Ami27,Paiva Nunes Ana27,Adamou Anastasia27,Peeters André27,Humm Andrea M.27,Zini Andrea27,Dhasan Aneesh27,Alonso Angelika27,Fischer Anna27,Saukkonen Anna Maija27,Müller Anna27,Berberich Anne27,Falcou Anne27,Devroye Annemie27,Hostens Arne27,Liesz Arthur27,Annamalai Arunkumar27,Sharma Arvind Vijaysharan27,Paliantonis Asterios27,Nallasivan Aumugam27,Abdul-Rahim Azmil27,Grimshaw Ben27,Kallmünzer Bernd27,Rodic Biljana27,Clarke Brian27,Menezes Brian27,Weder Bruno J.27,Ciobanu Carla27,Cereda Carlo W.27,Loos Caroline27,Kulyk Caterina27,Gonçalves Martins Catia27,Ferrari Cecilia27,Fung Christian27,Caporale Christina27,McAlpine Christine27,Globas Christoph27,Gumbinger Christoph27,Bonvin Christophe27,Krogias Christos27,Whyte Clare 27,Bassetti Claudio27,Ryan Dan27,Charissé Daniel27,Richter Daniel27,Schrammel Daniel27,Giudici Daria27,Nabavi Darius G.27,Bradley David27,Orion David27,Seiffge David J.27,Werring David27,Strambo Davide27,Esson Derek27,Khurana  Dheeraj27,Melancia Diana27,Staykov Dimitre27,Hemelsoet Dimitri27,Michalski Dominik27,Schlemm Eckhard27,Karagkiozi Efstathia27,Saxhaug Kristoffersen Espen27,Marcelis Evelyn27,Wright Fiona27,Delvoye François27,Medlin Friedrich27,Takayuki  Fukano27,Sirimarco Gaia27,Shim Gek27,Smith Gemma Marie27,Royl Georg 27,Pope George27,Salanti Georgia27,Sibolt Gerli27,Guzman-Gutierrez German27,De Marchis Gian Marco27,Bianco Giovanni27,Dymond Harvey27,Ihle-Hansen Hege27,Thomas Helen27,Stetefeld Henning R.27,Koundal Himanshu27,Asaf Honig27,Anwar Ijaz27,De Magistris Ilaria Leone27,Noone Imelda27,Olave Bersas Ingrid27,Muresan Ioan-Paul27,Vanpanteghem Isabelle27,Gralla Jan27,Vynckier Jan27,Demeestere Jelle27,Offermann Jens27,Pandian Jeyaraj Durai27,Sousa João André27,Marto João Pedro27,Sargento-Freitas João27,Vehoff Jochen27,Pelz Johann27,McCabe John J.27,Harbison Joseph27,Mbroh Joshua27,Wagner Judith27,Niederhauser Julien27,Sipilä Jussi27,Tanaka Kanta27,Rani Karthika27,Klimcikova Katarina27,Smith Kerry27,Soltesova Klaudia27,Macha Kosmas27,Matzusono Kosuke27,Szabo Kristina27,Yperzeele Laetitia27,Alteheld Lars27,Kellert Lars27,Healy Liam27,Zhang Liqun27,Fisch Loraine27,Gentile Luana27,Schelosky Ludwig27,Kellermair Lukas27,Gbadamosh Lukuman 27,Dixon Lynn27,Nakajima Makoto27,Inoue Manabu27,Krishnan Manju27,Bolognese Manuel27,Arnold Marcel27,Mosconi Maria Giulia27,Altmann Marianne27,Lang Marie27,Psychogios Marios27,Tiainen Marjaana27,Barber Mark27,Arnold Markus27,Magriço Marta27,Müller Martin27,Joan MacLeod Mary27,Greulich Matthias27,Rutgers Matthieu Pierre27,Schell Maximilian27,Garcia-Pons Melissa 27,Pøhner Skahjem Mette27,Haley Michael27,Marnane Michael27,Vosko Milan27,Katan Mira27,Mako Miroslav27,Polavarapu Naren27,Martinez-Majander Nicolas27,Del Gaudio Nicole27,Caracciolo Nicoletta G.27,Peters Nils27,Mahajan Niranjan27,Silimon Norbert27,Onur Oezguer A.27,Olbert Elisabeth27,Morten Rønning Ole27,Kelly Peter27,Ringleb Peter27,Slade Peter27,Vanacker Peter27,Desfontaines Philippe27,Nair Priya27,Marian Rados27,Parthasarathy             Rajsrinivas27,Hidalgo Rea27,Mulcahy Riona27,Kato Risa27,Bhatia Rohit27,Collins Ronan27,Leker Ronen R.27,Eichel Roni27,Tanaka Ryota27,Hussayni Husseini Samer Al27,Clarke Sandra27,Sreedharan Sapna Erat27,Ostanek Sarah27,Amina Sellimi27,Beyeler Seraina27,Storton Sharon27,Fujimoto Shigeru27,Räty Silja27,Fandler-Höfler Simon27,Galego Sofia27,Yoshimura Sohei27,Matsubara Soichiro27,Greisenegger Stefan27,Oberndorfer Stefan27,Ray Sucharita27,Renaud Susanne27,Riebau Susanne27,Poli Sven27,Politz Svetlana27,Albert Sylvan J.27,Kunieda Takenobu27,Sato Takeo27,Yoshimoto Takeshi27,Anjum Tal27,Pap Tatjana27,Costa Telma27,Pinho e Melo Teresa27,Iype Thomas27,Cassidy Tim27,Von Oertzen Tim J.27,Kahles Timo27,Danilo Toni27,Spetalen Torstein27,Tatlisumak Turgut27,De Herdt Veerle27,Borisova Victoria27,Pamidimukkala Vijaya27,Huded Vikram27,Gupta  Vipul27,Kumar Vishav27,Nambiar Vivek27,Pfeilschifter Waltraud27,Stoop Wendy27,Iguchi Yasuyuki27,Müller Seljeseth Yngve27,Abousleiman Youssif27,Yakushiji Yusuke27,Pencz Zoltan27

Affiliation:

1. Department of Neurology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland

2. University Institute of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland

3. Clinical Trials Unit, University of Bern, Bern, Switzerland

4. Department of Neurology, University of Basel and University Hospital Basel, Basel, Switzerland

5. Department of Neurology, Medical University of Graz, Graz, Austria

6. Division of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria

7. Support Center for Advanced Neuroimaging, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland

8. Department of Neurology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland

9. Internal, Vascular, and Emergency Medicine, Stroke Unit, Santa Maria della Misericordia Hospital, University of Perugia, Perugia, Italy

10. Department of Neurology, University Medical Center Hamburg–Eppendorf, Hamburg, Germany

11. Department of Neurology, University Hospital Lausanne, University of Lausanne, Lausanne, Switzerland

12. Department of Neurology, Cantonal Hospital Aarau, Aarau, Switzerland

13. Department of Neurology, Oslo University Hospital, Oslo, Norway

14. Research Department, Reha Rheinfelden, Rheinfelden, Switzerland

15. Stroke Center, Lisbon Central University Hospital, Lisbon, Portugal

16. Faculty of Medicine, Institute of Anatomy, University of Lisbon, Lisbon, Portugal

17. Department of Neurology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, India

18. Department of Internal Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece

19. Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan

20. Department of Neurology, Pavol Jozef Šafárik University, Košice, Slovakia

21. Faculty of Medicine, Louis Pasteur University Hospital, Košice, Slovakia

22. Department of Neurosciences, Experimental Neurology, KU Leuven, Leuven, Belgium

23. Department of Neurology, University Hospitals Leuven, Leuven, Belgium

24. Department of Neurology, Shaare-Zedek Medical Center, Jerusalem, Israel

25. Stroke Clinical Trials Network Ireland, School of Medicine, University College Dublin and Department of Neurology, Mater University Hospital, Dublin, Ireland

26. School of Cardiovascular and Metabolic Health, Queen Elizabeth University Hospital, University of Glasgow, Glasgow, United Kingdom

27. for the ELAN Investigators

Abstract

ImportanceWhether infarct size modifies the treatment effect of early vs late direct oral anticoagulant (DOAC) initiation in people with ischemic stroke and atrial fibrillation is unknown.ObjectiveTo assess whether infarct size modifies the safety and efficacy of early vs late DOAC initiation.Design, Setting, and ParticipantsPost hoc analysis of participants from the multinational (>100 sites in 15 countries) randomized clinical Early Versus Later Anticoagulation for Stroke With Atrial Fibrillation (ELAN) trial who had (1) acute ischemic stroke, (2) atrial fibrillation, and (3) brain imaging available before randomization. The ELAN trial was conducted between October 2017 and December 2022. Data were analyzed from October to December 2023 for this post hoc analysis.InterventionEarly vs late DOAC initiation after ischemic stroke. Early DOAC initiation was within 48 hours for minor or moderate stroke or on days 6 to 7 for major stroke; late DOAC initiation was on days 3 to 4 for minor stroke, days 6 to 7 for moderate stroke, and days 12 to 14 for major stroke.Main Outcomes and MeasuresThe primary outcome was a composite of recurrent ischemic stroke, symptomatic intracranial hemorrhage, extracranial bleeding, systemic embolism, or vascular death within 30 days. The outcome was assessed according to infarct size (minor, moderate, or major) using odds ratios and risk differences between treatment arms. Interrater reliability for infarct size between the core laboratory and local raters was assessed, and whether this modified the estimated treatment effects was also examined.ResultsA total of 1962 of the original 2013 participants (909 [46.3%] female; median [IQR] age, 77 [70-84] years) were included. The primary outcome occurred in 10 of 371 participants (2.7%) with early DOAC initiation vs 11 of 364 (3.0%) with late DOAC initiation among those with minor stroke (odds ratio [OR], 0.89; 95% CI, 0.38-2.10); in 11 of 388 (2.8%) with early DOAC initiation vs 14 of 392 (3.6%) with late DOAC initiation among those with moderate stroke (OR, 0.80; 95% CI, 0.35-1.74); and in 8 of 219 (3.7%) with early DOAC initiation vs 16 of 228 (7.0%) with late DOAC initiation among those with major stroke (OR, 0.52; 95% CI, 0.21-1.18). The 95% CI for the estimated risk difference of the primary outcome in early anticoagulation was −2.78% to 2.12% for minor stroke, −3.23% to 1.76% for moderate stroke, and −7.49% to 0.81% for major stroke. There was no significant treatment interaction for the primary outcome. For infarct size, interrater reliability was moderate (κ = 0.675; 95% CI, 0.647-0.702) for local vs core laboratory raters and strong (κ = 0.875; 95% CI, 0.855-0.894) between core laboratory raters.Conclusions and RelevanceThe treatment effect of early DOAC initiation did not differ in people with minor, moderate, or major stroke assessed by brain imaging. Early treatment was not associated with a higher rate of adverse events, especially symptomatic intracranial hemorrhage, for any infarct size, including major stroke.Trial RegistrationClinicalTrials.gov Identifier: NCT03148457

Publisher

American Medical Association (AMA)

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