Prior anticoagulation experience and bleeding risk with the factor XI inhibitor abelacimab in the AZALEA-TIMI 71 study

A Andre M. Small (1Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA) S Siddharth M. Patel (TIMI Study Group, Cardiovascular Division, Brigham and Women’s Hospital, Boston, MA.) R Robert P. Giugliano D David A. Morrow E Erica L. Goodrich (TIMI Study Group, Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston) B Bruce Hug S Sanobar Parkar S Shih-Ann Chen S Shaun G. Goodman (St. Michael’s Hospital, Unity Health Toronto, Peter Munk Cardiac Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada (S.G.G.).) B Boyoung Joung (Yonsei University, Seoul, Korea (the Republic of)) R Robert G. Kiss (Department of Cardiology, Central Hospital of Northern Pest-Military Hospital, Heart and Vascular Center, Semmelweis University, Budapest, Hungary (R.G.K.).) W Wojciech Wojakowski J Jeffrey I. Weitz (Thrombosis and Atherosclerosis Research Institute, Hamilton Health Sciences, and McMaster University, Hamilton, Canada (J.I.W.).) D Dan Bloomfield M Marc S. Sabatine (TIMI Study Group, Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston) C Christian T. Ruff

Abstract

Abstract This prespecified AZALEA-TIMI 71 analysis showed that prior oral anticoagulation (OAC) experience indicates bleeding risk in atrial fibrillation. The factor XI inhibitor abelacimab reduced bleeding regardless of prior OAC experience, with potentially greater absolute benefit among OAC-naïve patients. This trial was registered at www.ClinicalTrials.gov as NCT04755283.

Article Details

Journal Blood
Volume / Issue Vol. 148, Issue 6
Published August 06, 2026
Pages 789-792
ISSN 0006-4971
Publisher Elsevier BV

Journal Info

Blood

Elsevier BV

ISSN: 0006-4971 Health Sciences

Authors (16)

A

Andre M. Small

1Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA

S

Siddharth M. Patel

TIMI Study Group, Cardiovascular Division, Brigham and Women’s Hospital, Boston, MA.

R

Robert P. Giugliano

D

David A. Morrow

E

Erica L. Goodrich

TIMI Study Group, Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston

B

Bruce Hug

S

Sanobar Parkar

S

Shih-Ann Chen

S

Shaun G. Goodman

St. Michael’s Hospital, Unity Health Toronto, Peter Munk Cardiac Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada (S.G.G.).

B

Boyoung Joung

Yonsei University, Seoul, Korea (the Republic of)

R

Robert G. Kiss

Department of Cardiology, Central Hospital of Northern Pest-Military Hospital, Heart and Vascular Center, Semmelweis University, Budapest, Hungary (R.G.K.).

W

Wojciech Wojakowski

J

Jeffrey I. Weitz

Thrombosis and Atherosclerosis Research Institute, Hamilton Health Sciences, and McMaster University, Hamilton, Canada (J.I.W.).

D

Dan Bloomfield

M

Marc S. Sabatine

TIMI Study Group, Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston

C

Christian T. Ruff