Final Study Report of Andexanet Alfa for Major Bleeding With Factor Xa Inhibitors

作者：Truman J. Milling, Saskia Middeldorp, Lizhen Xu, Bruce Koch, Andrew M. Demchuk, John W. Eikelboom, Peter Verhamme, Alexander T. Cohen, Jan Beyer‐Westendorf, C. Michael Gibson, José López‐Sendón, Mark Crowther, Ashkan Shoamanesh, Michiel Coppens, Jeannot Schmidt, Pierre Albaladejo, Stuart J. Connolly, Ravinder Anand, Aveh Bastani, Carol L. Clark, Mauricio Concha, John A. Cornell, Keith Dombrowski, Gregory J. Fermann, James Fulmer, Joshua N. Goldstein, D.J. Kereiakes, Truman J. Milling, Daniel J. Pallin, Neha Patel, Majed A. Refaai, M. Rehman, Alvin H. Schmaier, E. Schwarz, William C. Shillinglaw, Michael Spohn, Tohru Takata, Arvind Venkat, James Welker, Ian J. Welsby, Joanna Y. Wilson, L. Van Keer, Franck Verschuren, Mark Blostein, John W. Eikelboom, Katharina Althaus, Jörg Berrouschot, Gary Braun, T. Doeppner, Rainer Dziewas, Sabine Genth‐Zotz, P. Greinacher, F. Hamann, Frank Hanses, W. Heide, Bernd Kallmuenzer, Pawel Kermer, Sven Poli, Georg Royl, Sebastian Schellong, Steffen Schnupp, Jürgen Schwarze, Claudia Spies, Götz Thomalla, Matthias von Mering, Karin Weißenborn, Frank A. Wollenweber, Christoph Gumbinger, Ulrich Jaschinski, M. Maschke, H-C. Mochmann, Waltraud Pfeilschifter, C. Pohlmann, Ralf Zahn, Pierre Bouzat, Jeannot Schmidt, Cristina Díez Vallejo, Bernard Floccard, Michiel Coppens, Sanne van Wissen, Eduardo Arellano‐Rodrigo, Ermengol Vallès, Raza Alikhan, Kerry J. Breen, Richard Hall, Mark Crowther, Pierre Albaladejo, Alexander T. Cohen, Andrew M. Demchuk, Jeannot Schmidt, D. George Wyse, D.A. Garcia, M.H. Prins, Juliet Nakamya, H.R. Büller, K. W. Mahaffey, John H. Alexander, John A. Cairns, R G Hart, Cameron D. Joyner, Gary E. Raskob, Sam Schulman, Roland Veltkamp, Brandi Meeks, Elena Zotova, Suhail Ahmad, Terezinha de Jesus Andreoli Pinto, Kenneth R. Baker, Andrea Dykstra, I. Holadyk-Gris, Antonio Malvaso, Andrew M. Demchuk · 发表于：Circulation · 年份：2023 · DOI：10.1161/circulationaha.121.057844 · 被引用次数：155 · 研究领域：Atrial Fibrillation Management and Outcomes、Blood Coagulation and Thrombosis Mechanisms、Hemophilia Treatment and Research

Background: Andexanet alfa is a modified recombinant inactive factor Xa (FXa) designed to reverse FXa inhibitors. ANNEXA-4 (Andexanet Alfa, a Novel Antidote to the Anticoagulation Effects of Factor Xa Inhibitors) was a multicenter, prospective, phase-3b/4, single-group cohort study that evaluated andexanet alfa in patients with acute major bleeding. The results of the final analyses are presented. Methods: Patients with acute major bleeding within 18 hours of FXa inhibitor administration were enrolled. Co-primary end points were anti-FXa activity change from baseline during andexanet alfa treatment and excellent or good hemostatic efficacy, defined by a scale used in previous reversal studies, at 12 hours. The efficacy population included patients with baseline anti-FXa activity levels above predefined thresholds (≥75 ng/mL for apixaban and rivaroxaban, ≥40 ng/mL for edoxaban, and ≥0.25 IU/mL for enoxaparin; reported in the same units used for calibrators) who were adjudicated as meeting major bleeding criteria (modified International Society on Thrombosis and Haemostasis definition). The safety population included all patients. Major bleeding criteria, hemostatic efficacy, thrombotic events (stratified by occurring before or after restart of either prophylactic [ie, a lower dose, for prevention rather than treatment] or full-dose oral anticoagulation), and deaths were assessed by an independent adjudication committee. Median endogenous thrombin potential at baseline and acro...