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Ng JY, D’Souza M, Hutani F, Choi P. Management of Heparin-Induced Thrombocytopenia: A Contemporary Review. J Clin Med 2024; 13:4686. [PMID: 39200826 PMCID: PMC11355627 DOI: 10.3390/jcm13164686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 07/25/2024] [Accepted: 07/31/2024] [Indexed: 09/02/2024] Open
Abstract
Heparin-induced thrombocytopenia (HIT) is a life- and limb-threatening immune-mediated emergency classically associated with heparin therapy. This review focuses on type II HIT, characterized by the development of antibodies against platelet-factor 4 (PF4) bound to heparin after exposure, causing life-threatening thrombocytopenia, arterial thrombosis, and/or venous thrombosis. The high morbidity and mortality rates emphasize the need for early recognition and urgent intervention with discontinuation of heparin and initiation of non-heparin anticoagulation. We discuss the management of HIT with an emphasis on recent developments: (i) incorporating the phases of HIT (i.e., suspected, acute, subacute A and B, and remote) into its management, categorized according to platelet count, immunoassay, and functional assay results and (ii) direct-acting oral anticoagulants (DOACs), which are increasingly used in appropriate cases of acute HIT (off-label). In comparison to parenteral options (e.g., bivalirudin and danaparoid), they are easier to administer, are more cost-effective, and obviate the need for transition to an oral anticoagulant after platelet recovery. We also identify the knowledge gaps and suggest areas for future research.
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Affiliation(s)
- Jun Yen Ng
- Department of Hematology, Canberra Hospital, Canberra 2605, Australia (P.C.)
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Choi PYI, Uzun G, Bakchoul T. Results of an international survey of opinions on the definitions and treatments for heparin-induced thrombocytopenia: communication from the ISTH SSC Subcommittee on Platelet Immunology. J Thromb Haemost 2024; 22:1772-1778. [PMID: 38301999 DOI: 10.1016/j.jtha.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/08/2024] [Accepted: 01/20/2024] [Indexed: 02/03/2024]
Abstract
Heparin-induced thrombocytopenia (HIT) is rare, affecting fewer than 1 in 1500 hospital admissions. Despite the increasing adoption of new therapies in HIT, such as direct oral anticoagulants and pooled immunoglobulins, there is limited high-quality evidence to guide clinicians. Numerous uncommon presentations of HIT and HIT-like entities have recently been recognized, and a harmonized approach to their classification is required to study them better. We present the results of an international survey of opinions from experts and practitioners in the field of platelet immunology regarding the role of direct oral anticoagulants in HIT, novel definitions of subclassifications of HIT-like platelet factor 4 immune conditions (spontaneous autoimmune HIT, persistent autoimmune HIT, and treatment-refractory HIT), and the role for intravenous immunoglobulins in the treatment paradigm of HIT and these HIT-like conditions. From 102 survey responses, there was broad acceptance of rivaroxaban (74.5%) and apixaban (73.5%) even before platelet recovery, as well as for intravenous immunoglobulin in the management of spontaneous (85.6%), persistent (83.7%), and treatment-refractory HIT (87.4%). With this mandate for harmonizing terminologies and treatment approaches in special situations without robust clinical data owing to their rarity, we plan to conduct a robust survey, establish international consensus, and draft management guidelines for HIT and platelet factor 4 immune diseases in the near future.
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MESH Headings
- Humans
- Heparin/adverse effects
- Heparin/immunology
- Immunoglobulins, Intravenous/therapeutic use
- Immunoglobulins, Intravenous/adverse effects
- Thrombocytopenia/chemically induced
- Thrombocytopenia/immunology
- Thrombocytopenia/diagnosis
- Anticoagulants/adverse effects
- Platelet Factor 4/immunology
- Surveys and Questionnaires
- Pyrazoles/adverse effects
- Pyrazoles/therapeutic use
- Blood Platelets/immunology
- Blood Platelets/drug effects
- Blood Platelets/metabolism
- Pyridones/adverse effects
- Pyridones/therapeutic use
- Rivaroxaban/adverse effects
- Purpura, Thrombocytopenic, Idiopathic/chemically induced
- Purpura, Thrombocytopenic, Idiopathic/immunology
- Purpura, Thrombocytopenic, Idiopathic/diagnosis
- Purpura, Thrombocytopenic, Idiopathic/blood
- Purpura, Thrombocytopenic, Idiopathic/drug therapy
- Health Care Surveys
- Terminology as Topic
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Affiliation(s)
- Philip Young-Ill Choi
- Haematology Department, the Canberra Hospital, Garran, Canberra, Australian Capital Territory, Australia; John Curtin School of Medical Research, Australian National University, Acton, Canberra, Australian Capital Territory, Australia
| | - Günalp Uzun
- Institute for Clinical and Experimental Transfusion Medicine, University Hospital of Tübingen, Tübingen, Germany; Centre for Clinical Transfusion Medicine, Tübingen, Germany
| | - Tamam Bakchoul
- Institute for Clinical and Experimental Transfusion Medicine, University Hospital of Tübingen, Tübingen, Germany; Centre for Clinical Transfusion Medicine, Tübingen, Germany.
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Farasatinasab M, Baloochzehi S, Moghamddam OM, Ansarinejad N, Mohammadi M, Nasiripour S. An Open-Label, Single-Arm, Pilot Intervention Study to Assess the Efficacy and Safety of Apixaban in Heparin-Induced Thrombocytopenia. J Clin Pharmacol 2022; 62:1379-1384. [PMID: 35656855 DOI: 10.1002/jcph.2096] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/31/2022] [Indexed: 11/05/2022]
Abstract
Heparin-induced thrombocytopenia (HIT) is a serious adverse drug reaction due to its related risk of life- and limb-threatening thrombosis. Apixaban is a direct factor Xa inhibitor that may be intended as an ideal alternative for the management of HIT. In this open-label, single-arm, pilot intervention study, the efficacy and safety of apixaban were evaluated in 30 patients over the age of 18 with clinically suspected HIT (4Ts score 4 points or greater). Patients with mechanical heart valves, chronic kidney disease, hepatic impairment, and active bleeding were excluded. In all patients with inclusion criteria, heparin or enoxaparin was discontinued and apixaban was started. The dose of apixaban for HIT suspected patients were defined based on the reason for anticoagulant therapy. Endpoints included confirmed thrombosis, mortality, and adverse treatment-related events. After Apixaban therapy, platelet counts normalized in all patients, none of the 30 subjects developed new, progressive, or recurrent thrombosis, and only 1/30 patients developed hemorrhagic events. Five patients (16.7%) died, but the reason for death was not linked to thrombosis, hemorrhage, or adverse effects of apixaban. Along with the available emerging data, our results propose that apixaban could be a safe and effective drug for the management of suspected HIT in clinically stable patients. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Maryam Farasatinasab
- Department of Clinical Pharmacy, Firoozgar Clinical Research Development Center (FCRDC), Iran University of Medical Sciences, Tehran, Iran
| | - Saeedeh Baloochzehi
- School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran, Iran
| | - Omid Moradi Moghamddam
- Department of Critical Care Medicine, Rasool Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Nafiseh Ansarinejad
- Department of Haematology and Oncology, Hazrat-e Rasool Akram University Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Mahmonir Mohammadi
- Department of Cardiology, Azad University of Medical Sciences, Tehran, Iran
| | - Somayyeh Nasiripour
- Department of Clinical Pharmacy, Rasool Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
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Cirbus K, Simone P, Austin Szwak J. Rivaroxaban and apixaban for the treatment of suspected or confirmed heparin-induced thrombocytopenia. J Clin Pharm Ther 2021; 47:112-118. [PMID: 34704283 DOI: 10.1111/jcpt.13537] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 09/09/2021] [Accepted: 09/22/2021] [Indexed: 01/04/2023]
Abstract
WHAT IS KNOWN AND OBJECTIVE Heparin-induced thrombocytopenia (HIT) is an adverse hematologic drug reaction that results in thrombocytopenia. This potentially life-threatening event is due to the administration of heparin products, such as unfractionated heparin (UFH) and low-molecular-weight heparin (LMWH). The incidence of HIT occurs in <0.1%-7% of hospitalized patients treated with heparin products, with a risk of thrombosis as high as 50%. In 2018, the American Society of Hematology (ASH) recommended the utilization of direct oral anticoagulants (DOACs) in clinically stable patients at average bleeding risk with HIT. The objective of this study was to evaluate the prescribing patterns of rivaroxaban and apixaban for the treatment of suspected or confirmed HIT. METHODS This was a retrospective chart review from January 2013 through October 2019 at the University of Chicago Medicine. Twelve patients were identified to have received a DOAC for suspected or confirmed HIT. RESULTS Rivaroxaban was utilized in seven (58%) patients, six of whom received argatroban prior to starting rivaroxaban. Five (71%) of these patients were started on the recommended dose of rivaroxaban for VTE. Apixaban was utilized in five (42%) patients; four patients were started on argatroban and transitioned to apixaban. One patient was started on the suggested dose of apixaban for VTE. WHAT IS NEW AND CONCLUSION After starting DOACs for suspected HIT, no patients had new thrombosis during hospitalization. Eight patients (67%) followed up at our institution within 6 months of their discharge date. No subsequent thrombi formation were identified for any of these patients. The results of this study add to the expanding literature regarding the safety and efficacy of DOAC use in HIT, and indicate DOACs are being increasingly utilized for the treatment of confirmed or suspected HIT.
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Affiliation(s)
- Kristen Cirbus
- Department of Pharmacy Services, University of Chicago Medicine, Chicago, Illinois, USA
| | - Pamela Simone
- Department of Pharmacy Services, University of Chicago Medicine, Chicago, Illinois, USA
| | - Jennifer Austin Szwak
- Department of Pharmacy Services, University of Chicago Medicine, Chicago, Illinois, USA
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Carré J, Guérineau H, Le Beller C, Mauge L, Huynh B, Nili R, Planquette B, Clauser S, Smadja DM, Helley D, Lillo-Le Louet A, Gendron N, Calmette L. Direct Oral Anticoagulants as Successful Treatment of Heparin-Induced Thrombocytopenia: A Parisian Retrospective Case Series. Front Med (Lausanne) 2021; 8:713649. [PMID: 34422867 PMCID: PMC8374891 DOI: 10.3389/fmed.2021.713649] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 07/08/2021] [Indexed: 02/02/2023] Open
Abstract
Background: Heparin-induced thrombocytopenia (HIT) is a prothrombotic life-threatening disorder caused by an adverse reaction to heparin exposure. In this context, it is imperative to stop heparin immediately and to replace it by a non-heparin anticoagulant therapy. Despite their advantages, the use of direct oral anticoagulants (DOACs) is only emerging for HIT treatment, and their use remains rare. Objective: To improve our knowledge on the emerging role of DOACs as treatment of HIT and give an overview of our local practices in this context. Patients/Methods: This is a multi-centric retrospective case series of HIT patients referred to our Parisian pharmacovigilance network and treated with DOACs. Results: We report the cases of seven patients from four healthcare centers, diagnosed with HIT (4T score ≥ 4, positive anti-PF4/heparin immunoassay and positive serotonin-release assay) and treated with DOACs. After a few days on substitutive parenteral treatment (n = 6) or directly at HIT diagnosis (n = 1), these patients were treated with either rivaroxaban (n = 6) or apixaban (n = 1) during acute HIT phase. Mean time to platelet count recovery after heparin discontinuation was 3.3 days (range 3-5). No patient experienced major or clinically relevant non-major bleeding or thrombosis that could be related to DOAC treatment during follow-up. Conclusions: Our cases studies are consistent with recent guidelines credit to the potential and safe use of DOAC during acute HIT in clinically stable patients.
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Affiliation(s)
- Julie Carré
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Hematology Department, Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Hippolyte Guérineau
- Hematology-Immunology-Transfusion Department, Hôpitaux Universitaires Paris Ile De France Ouest, Université Versailles Saint Quentin, Boulogne, France
| | - Christine Le Beller
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Pharmacovigilance Department, Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Laëtitia Mauge
- Hematology Department, Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France.,INSERM UMR-S970, Centre de Recherche Cardiovasculaire de Paris, Paris, France
| | - Benoit Huynh
- Hematology Department, Institut Mutualiste Montsouris, Paris, France
| | - Roya Nili
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Pharmacovigilance Department, Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Benjamin Planquette
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Respiratory Medicine Department and Biosurgical Research Lab (Carpentier Foundation), Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Sylvain Clauser
- Hematology-Immunology-Transfusion Department, Hôpitaux Universitaires Paris Ile De France Ouest, Université Versailles Saint Quentin, Boulogne, France
| | - David M Smadja
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Hematology Department and Biosurgical Research Lab (Carpentier Foundation), Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Dominique Helley
- Hematology Department, Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France.,INSERM UMR-S970, Centre de Recherche Cardiovasculaire de Paris, Paris, France
| | - Agnès Lillo-Le Louet
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Pharmacovigilance Department, Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Nicolas Gendron
- Innovative Therapies in Haemostasis, INSERM, Université de Paris, Paris, France.,Hematology Department and Biosurgical Research Lab (Carpentier Foundation), Assistance Publique Hôpitaux de Paris, Centre-Université de Paris, Paris, France
| | - Leyla Calmette
- Hematology-Immunology-Transfusion Department, Hôpitaux Universitaires Paris Ile De France Ouest, Université Versailles Saint Quentin, Boulogne, France
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Munafo N, Patel S, Willett KC, Morrill A. Oral Factor Xa (FXa) Inhibitors for Treatment of Heparin-induced Thrombocytopenia (HIT). CURRENT DRUG THERAPY 2021. [DOI: 10.2174/1574885515999201210213348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background::
Heparin is the most commonly used injectable anticoagulant for many indications,
ranging from the treatment of atrial fibrillation to the prevention of clotting in patients
undergoing surgery. Currently, only argatroban and bivalirudin are FDA approved for the management
of heparin induced thrombocytopenia (HIT) in the United States, both of which are direct
thrombin inhibitors. The agents being reviewed, apixaban and rivaroxaban, are oral direct factor
Xa (FXa) inhibitors. Currently, neither has FDA approval for use in HIT. The objective of this review
is to summarize the current evidence available regarding the use of oral factor Xa inhibitors
for the treatment of HIT.
Methods::
A literature search was conducted using Medline and Ovid Embase. Search terms included
heparin-induced thrombocytopenia, HIT, apixaban, rivaroxaban, Xa Inhibitor, direct thrombin
inhibitor, NOAC, and DOAC. Studies and case reports were included if they evaluated the efficacy
and safety of oral FXa inhibitors for the treatment of HIT. Additional literature and case reports
were found through bibliographic review.
Results and Discussion:
Currently, available literature includes an in vitro study with apixaban,
case reports, and retrospective and prospective cohort studies. The in vitro study evaluated the interaction
between apixaban and platelets in the presence of HIT antibodies, which assessed its potential
for use in HIT management. Fourteen case reports and one case series were also identified, of
which six described treatment with apixaban and eight with rivaroxaban. Lastly, four cohort
studies were published evaluating the use of direct acting oral anticoagulants (DOACs), including
oral factor Xa inhibitors in patients with HIT. Although there are no published randomized control
trials evaluating the use of FXa inhibitors in the management of HIT, there are several findings that
may guide clinicians on the use of these agents in practice.
Conclusion::
As indicated by the case reports, case series and cohort studies detailing clinical use
and described in this manuscript, there are data and positive patient outcomes that support the potential
use of these agents for HIT, and are an impetus for future studies.
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Affiliation(s)
- Nicholas Munafo
- Department of Pharmacy Practice, MCPHS University School of Pharmacy Worcester/Manchester, 19 Foster Street Worcester, MA, 01608, United States
| | - Sagar Patel
- Department of Pharmacy Practice, MCPHS University School of Pharmacy–Worcester/- Manchester Sanofi Genzyme, Cambridge, MA, United States
| | - Kristine C. Willett
- Department of Pharmacy Practice MCPHS University, School of Pharmacy – Worcester/Manchester, United States
| | - Amanda Morrill
- Department of Pharmacy Practice MCPHS University, School of Pharmacy – Worcester/Manchester, United States
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Nilius H, Kaufmann J, Cuker A, Nagler M. Comparative effectiveness and safety of anticoagulants for the treatment of heparin-induced thrombocytopenia. Am J Hematol 2021; 96:805-815. [PMID: 33857342 PMCID: PMC8252596 DOI: 10.1002/ajh.26194] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 04/12/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND The effectiveness and safety of non-heparin anticoagulants for the treatment of heparin-induced thrombocytopenia (HIT) are not fully established, and the optimal treatment strategy is unknown. In a systematic review and meta-analysis, we aimed to determine precise rates of platelet recovery, new or progressive thromboembolism (TE), major bleeding, and death for all non-heparin anticoagulants and to study potential sources of variability. METHODS Following a detailed protocol (PROSPERO: CRD42020219027), EMBASE and Medline were searched for all studies reporting clinical outcomes of patients treated with non-heparin anticoagulants (argatroban, danaparoid, fondaparinux, direct oral anticoagulants [DOAC], bivalirudin, and other hirudins) for acute HIT. Proportions of patients with the outcomes of interest were pooled using a random-effects model for each drug. The influence of the patient population, the diagnostic test used, the study design, and the type of article was assessed. RESULTS Out of 3194 articles screened, 92 studies with 119 treatment groups describing 4698 patients were included. The pooled rates of platelet recovery ranged from 74% (bivalirudin) to 99% (fondaparinux), TE from 1% (fondaparinux) to 7% (danaparoid), major bleeding from 1% (DOAC) to 14% (bivalirudin), and death from 7% (fondaparinux) to 19% (bivalirudin). Confidence intervals were mostly overlapping, and results were not influenced by patient population, diagnostic test used, study design, or type of article. DISCUSSION Effectiveness and safety outcomes were similar among various anticoagulants, and significant factors affecting these outcomes were not identified. These findings support fondaparinux and DOACs as viable alternatives to conventional anticoagulants for treatment of acute HIT in clinical practice.
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Affiliation(s)
- Henning Nilius
- Department of Clinical ChemistryInselspital, Bern University HospitalBernSwitzerland
| | - Jonas Kaufmann
- Department of Clinical ChemistryInselspital, Bern University HospitalBernSwitzerland
| | - Adam Cuker
- Department of Medicine and Department of Pathology and Laboratory MedicineUniversity of Pennsylvania Perelman School of MedicinePhiladelphiaPennsylvaniaUSA
| | - Michael Nagler
- Department of Clinical ChemistryInselspital, Bern University HospitalBernSwitzerland
- University of BernBernSwitzerland
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Rivaroxaban Treatment for Heparin-Induced Thrombocytopenia: A Case Report and a Review of the Current Experience. Case Rep Hematol 2020; 2020:8885256. [PMID: 32953186 PMCID: PMC7487115 DOI: 10.1155/2020/8885256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/14/2020] [Accepted: 08/26/2020] [Indexed: 11/17/2022] Open
Abstract
Heparin-induced thrombocytopenia is a life-threatening complication of exposure to heparin. Heparin-induced thrombocytopenia results from an autoantibody directed against platelet factor 4 in complex with heparin. Heparin-induced thrombocytopenia is traditionally treated with bivalirudin, argatroban, danaparoid, or fondaparinux. Recently, direct oral anticoagulants administration to treat heparin-induced thrombocytopenia has been reported. Direct oral anticoagulants do not cause platelet activation in the presence of heparin-platelet factor 4 antibodies, nor do they provoke autoantibody production. Direct oral anticoagulants offer advantages such as consistent and predictable anticoagulation, oral administration with good patient compliance, and a good safety profile. We report a case of heparin-induced thrombocytopenia with deep venous thrombosis successfully treated with rivaroxaban and review the current experience with rivaroxaban for the treatment of heparin-induced thrombocytopenia.
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Farasatinasab M, Zarei B, Moghtadaei M, Nasiripour S, Ansarinejad N, Zarei M. Rivaroxaban as an Alternative Agent for Heparin-Induced Thrombocytopenia. J Clin Pharmacol 2020; 60:1362-1366. [PMID: 32519800 DOI: 10.1002/jcph.1635] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/13/2020] [Indexed: 11/09/2022]
Abstract
Heparin-induced thrombocytopenia (HIT) is a high-risk adverse drug reaction because of its associated risk of life- and limb-threatening thrombosis. Rivaroxaban may be considered as an ideal nonheparin anticoagulant alternative for the management of HIT. In this preliminary retrospective study, the efficacy and safety of rivaroxaban to control the clinically suspected HIT (4Ts score 4 points or greater) were evaluated. Patients with chronic kidney disease, hepatic impairment, mechanical heart valves, and active bleeding were excluded. Forty-two eligible patients who received rivaroxaban for clinically suspected HIT were evaluated by medical records review, with 12-month follow-up after the first dose of rivaroxaban. End points included confirmed thrombosis (primary end point), mortality, and adverse treatment-related events. HIT-associated thrombosis was found in 17/42 (40.5%) patients before receiving rivaroxaban. After rivaroxaban therapy, platelet counts normalized in all patients, with only 1/42 (2.3%) patients developing new thrombosis. No hemorrhagic event was recorded in the patients. Twelve patients (28.6%) died, but the cause of death was not related to the thrombosis, hemorrhage, or adverse effects of rivaroxaban. Our findings are consistent with the available emerging data, suggesting that rivaroxaban is a safe and effective drug for the management of clinically suspected HIT. Rivaroxaban is a particularly valuable treatment option in developing countries, where there are issues of cost and availability of approved alternative agents.
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Affiliation(s)
- Maryam Farasatinasab
- Department of Clinical Pharmacy, School of Pharmacy-International Campus, Firoozgar Clinical Research Development Center, Iran University of Medical Sciences, Tehran, Iran
| | - Behnaz Zarei
- Student of Pharmacy, Azad University of Medical Sciences, Tehran, Iran
| | - Mehdi Moghtadaei
- Department of Orthopedic Surgery, Iran University of Medical Sciences, Tehran, Iran
| | - Somayyeh Nasiripour
- Department of Clinical Pharmacy, School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran, Iran
| | - Nafiseh Ansarinejad
- Department of Haematology and Oncology, Hazrat-e Rasool Akram University Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Zarei
- Department of Internal Medicine, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran
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10
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Koehl JL, Hayes BD, Al‐Samkari H, Rosovsky R. A comprehensive evaluation of apixaban in the treatment of venous thromboembolism. Expert Rev Hematol 2020; 13:155-173. [DOI: 10.1080/17474086.2020.1711731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jennifer L Koehl
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
| | - Bryan D. Hayes
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
| | - Hanny Al‐Samkari
- Division of Hematology & Oncology, Department of Medicine, Massachusetts Hospital, Boston, MA, USA
| | - Rachel Rosovsky
- Division of Hematology & Oncology, Department of Medicine, Massachusetts Hospital, Boston, MA, USA
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11
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Malec K, Broniatowska E, Undas A. Direct oral anticoagulants in patients with antiphospholipid syndrome: a cohort study. Lupus 2020; 29:37-44. [DOI: 10.1177/0961203319889156] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Objectives Despite controversies, direct oral anticoagulants (DOACs) are increasingly used in antiphospholipid syndrome (APS). We investigated the safety and efficacy of DOACs versus vitamin K antagonists (VKAs) in real-life consecutive APS patients. Patients and methods In a cohort study of 176 APS patients, which included 82 subjects who preferred DOACs or had unstable anticoagulation with VKAs, we recorded venous thromboembolism (VTE), cerebrovascular ischemic events or myocardial infarction, along with major bleeding or clinically relevant non-major bleeding (CRNMB). Results APS patients were followed for a median time of 51 (interquartile range 43–63) months. Patients on DOACs and those on VKAs were similar with regard to baseline characteristics. APS patients treated with DOACs had increased risk of recurrent thromboembolic events and recurrent VTE alone compared with those on VKAs (hazard ratio (HR) = 3.98, 95% confidence interval (CI): 1.54–10.28, p = 0.004 and HR = 3.69, 95% CI: 1.27–10.68, p = 0.016, respectively) with no differences between rivaroxaban and apixaban or single- or double-positive and triple-positive APS. Thromboembolism on DOACs was associated with older age (median 52 versus 42 years, p = 0.008) and higher global APS score (median 13 versus 8.5, p = 0.013). Patients on DOACs had increased risk of major bleeding or CRNMB (HR = 3.63, 95% CI: 1.53–8.63, p = 0.003), but rates of gastrointestinal bleeds (HR = 3.36, 95% CI: 0.70–16.16, p = 0.13) and major bleeds or CRNMB other than heavy menstrual bleeding (HR = 2.45, 95% CI: 0.62–9.69, p = 0.2) were similar in both treatment groups. Conclusion During long-term follow-up of real-life APS patients, DOACs are less effective and less safe as VKAs in the prevention of thromboembolism.
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Affiliation(s)
- K Malec
- Department of Otolaryngology, Head and Neck Surgery, 5th Military Hospital with Polyclinic, Krakow, Poland
| | - E Broniatowska
- Faculty of Medicine and Health Science, Andrzej Frycz Modrzewski Krakow University, Krakow, Poland
| | - A Undas
- Institute of Cardiology, Jagiellonian University Medical College, Krakow, Poland
- John Paul II Hospital, Krakow, Poland
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Sanchez-Redondo J, Espinosa G, Varillas Delgado D, Cervera R. Recurrent Thrombosis With Direct Oral Anticoagulants in Antiphospholipid Syndrome: A Systematic Literature Review and Meta-analysis. Clin Ther 2019; 41:1839-1862. [DOI: 10.1016/j.clinthera.2019.06.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/04/2019] [Accepted: 06/25/2019] [Indexed: 01/30/2023]
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14
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Barlow A, Barlow B, Reinaker T, Harris J. Potential Role of Direct Oral Anticoagulants in the Management of Heparin-induced Thrombocytopenia. Pharmacotherapy 2019; 39:837-853. [PMID: 31233222 DOI: 10.1002/phar.2298] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Heparin-induced thrombocytopenia (HIT) is a rare, potentially life-threatening condition secondary to unfractionated heparin or low molecular weight heparin exposure. This immune-mediated drug reaction manifests as thrombocytopenia with a paradoxical hypercoagulable state that can result in life-threatening thrombosis. It is imperative to ensure cessation of heparin-based products as soon as HIT is identified. Traditional treatment options include argatroban, bivalirudin, fondaparinux, and danaparoid with a transition to warfarin upon platelet recovery. These anticoagulants are notwithstanding limitations including parenteral administration and routine laboratory monitoring leading to prolonged hospitalizations, emphasizing the need for new therapies. Direct oral anticoagulants (DOACs) have been increasingly investigated for the management of HIT and may overcome the aforementioned challenges of current therapies. The objective of this narrative review is to summarize the current HIT guidelines, discuss limitations to contemporary treatment options, provide insight into the emerging evidence for the DOACs rivaroxaban, apixaban, and dabigatran, and conclude with a clinical summary for their use in this setting. The PubMed, Google Scholar, and MEDLINE databases were searched for peer-reviewed literature from January 1, 2012, to June 31, 2018. Twenty-seven articles met inclusion criteria for review: 1 prospective trial, 5 retrospective cohort studies, and 21 case reports totaling 104 patients treated with a DOAC for HIT. The DOACs prevented new and recurrent thrombosis in 98% (n=102) of cases, and bleeding complications occurred in 3% (n=3). While current literature remains limited, it is suggestive of a potential role of DOACs for HIT, which has led to their integration into the 2018 American Society Hematology Guidelines with a conditional recommendation.
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Affiliation(s)
- Ashley Barlow
- Thomas Jefferson College of Pharmacy, Philadelphia, Pennsylvania
| | - Brooke Barlow
- Thomas Jefferson College of Pharmacy, Philadelphia, Pennsylvania
| | - Travis Reinaker
- Department of Pharmacy, Einstein Medical Center, Philadelphia, Pennsylvania
| | - Justin Harris
- Department of Pharmacy, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
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15
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Elsebaie MAT, van Es N, Langston A, Büller HR, Gaddh M. Direct oral anticoagulants in patients with venous thromboembolism and thrombophilia: a systematic review and meta-analysis. J Thromb Haemost 2019; 17:645-656. [PMID: 30690830 DOI: 10.1111/jth.14398] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Indexed: 12/15/2022]
Abstract
Essentials We investigated direct oral anticoagulant (DOAC) use in venous thromboembolism and thrombophilia. A comprehensive search identified 10 studies, 8 of which were included in a meta-analysis. DOACs were overall safe and effective in patients with venous thromboembolism and thrombophilia. Efficacy/safety of DOACs was maintained in low-risk antiphospholipid syndrome patient subgroup. SUMMARY: Background Direct oral anticoagulants (DOACs) are increasingly used in acute and long-term treatment of venous thromboembolism (VTE). However, their role in management of thrombophilia-associated VTE is controversial. Methods Through a comprehensive search on MEDLINE, Cochrane Library, and Clinicaltrials.gov, we identified 10 eligible studies, 8 of which reporting data on 1994 thrombophilia patients were included in a random-effects meta-analysis. Eligible studies were phase 2 to 3 randomized controlled trials comparing DOACs to vitamin K antagonists (VKAs) in patients with VTE, including those with thrombophilia. Results Of eight studies included in meta-analysis, four evaluated rivaroxaban, three dabigatran, and one edoxaban. No results could be obtained on apixaban use. The rates of VTE recurrence (RR, 0.70; 95% CI, 0.34-1.44; I2 = 0%) and major/clinically relevant non-major bleeding events (RR, 0.92; 95% CI, 0.62-1.36; I2 = 23%) were similar between thrombophilia patients treated with DOACs compared to VKAs. Results were comparable to findings in patients without known thrombophilia: RR, 1.02; 95% CI, 0.80-1.30; I2 = 46% for VTE recurrence and RR, 0.72; 95% CI, 0.57-0.90; I2 = 84% for major/clinically relevant non-major bleeding events. Conclusions Rates of VTE recurrence and bleeding events were both low and comparable in patients with various thrombophilias receiving either treatment, suggesting that DOACs are an appropriate treatment option in this population. Due to limited data, it is unclear whether these findings apply to specific subgroups such as high-risk antiphospholipid syndrome, uncommon thrombophilias, or the use of apixaban.
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Affiliation(s)
| | - Nick van Es
- Department of Vascular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - Amelia Langston
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Harry R Büller
- Department of Vascular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - Manila Gaddh
- Winship Cancer Institute of Emory University, Atlanta, GA, USA
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16
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Ramachandran P, Farag F, Morcus R, Gotlieb V. Autoimmune Heparin-Induced Thrombocytopenia: Treatment Obstacles and Challenging Length of Stay. AMERICAN JOURNAL OF CASE REPORTS 2019; 20:310-313. [PMID: 30850576 PMCID: PMC6419528 DOI: 10.12659/ajcr.914575] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Patient: Male, 55 Final Diagnosis: Auto-immune heparin thrombocytopenia -Treatment obstacles and challenging length of stay Symptoms: Thrombocytopenia • thrombosis Medication: — Clinical Procedure: IVIG Specialty: Hematology
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Affiliation(s)
- Preethi Ramachandran
- Division of Hematology and Medical Oncology, Brookdale University Hospital, Brooklyn, NY, USA
| | - Fady Farag
- Division of Hematology and Medical Oncology, Brookdale University Hospital, Brooklyn, NY, USA
| | - Rewais Morcus
- Division of Hematology and Medical Oncology, Brookdale University Hospital, Brooklyn, NY, USA
| | - Vladimir Gotlieb
- Division of Hematology and Medical Oncology, Brookdale University Hospital, Brooklyn, NY, USA
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17
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Bakchoul T, Marini I. Drug-associated thrombocytopenia. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2018; 2018:576-583. [PMID: 30504360 PMCID: PMC6246020 DOI: 10.1182/asheducation-2018.1.576] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Many drugs have been implicated in drug-induced immune thrombocytopenia (DITP). Patients with DITP develop a drop in platelet count 5 to 10 days after drug administration with an increased risk of hemorrhage. The diagnosis of DITP is often challenging, because most hospitalized patients are taking multiple medications and have comorbidities that can also cause thrombocytopenia. Specialized laboratory diagnostic tests have been developed and are helpful to confirm the diagnosis. Treatment of DITP involves discontinuation of the offending drug. The platelet count usually starts to recover after 4 or 5 half-lives of the responsible drug or drug metabolite. High doses of intravenous immunoglobulin can be given to patients with severe thrombocytopenia and bleeding. Although in most cases, DITP is associated with bleeding, life-threatening thromboembolic complications are common in patients with heparin-induced thrombocytopenia (HIT). Binding of antiplatelet factor 4/heparin antibodies to Fc receptors on platelets and monocytes causes intravascular cellular activation, leading to an intensely prothrombotic state in HIT. The clinical symptoms include a decrease in platelet counts by >50% and/or new thromboembolic complications. Two approaches can help to confirm or rule out HIT: assessment of the clinical presentation using scoring systems and in vitro demonstration of antiplatelet factor 4/heparin antibodies. The cornerstone of HIT management is immediate discontinuation of heparin when the disease is suspected and anticoagulation using nonheparin anticoagulant. In this review, we will provide an update on the pathophysiology, diagnosis, and management of both DITP and HIT.
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Affiliation(s)
- Tamam Bakchoul
- Transfusion Medicine, Medical Faculty of Tubingen, University of Tubingen, Tubingen, Germany
| | - Irene Marini
- Transfusion Medicine, Medical Faculty of Tubingen, University of Tubingen, Tubingen, Germany
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18
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Dufrost V, Risse J, Reshetnyak T, Satybaldyeva M, Du Y, Yan XX, Salta S, Gerotziafas G, Jing ZC, Elalamy I, Wahl D, Zuily S. Increased risk of thrombosis in antiphospholipid syndrome patients treated with direct oral anticoagulants. Results from an international patient-level data meta-analysis. Autoimmun Rev 2018; 17:1011-1021. [DOI: 10.1016/j.autrev.2018.04.009] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 04/22/2018] [Indexed: 02/05/2023]
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19
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Signorelli F, Balbi GGM, Domingues V, Levy RA. New and upcoming treatments in antiphospholipid syndrome: A comprehensive review. Pharmacol Res 2018; 133:108-120. [DOI: 10.1016/j.phrs.2018.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 02/23/2018] [Accepted: 04/15/2018] [Indexed: 12/11/2022]
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20
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Anticoagulation in a patient with antiphospholipid syndrome and a mechanical heart valve: a case study. Blood Coagul Fibrinolysis 2018; 29:472-475. [PMID: 29939846 DOI: 10.1097/mbc.0000000000000747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
: A case report of a patient with antiphospholipid syndrome (APS) with positive lupus anticoagulant and a mechanical mitral valve replacement (MVR) who presented with a thrombosis and difficult-to-control INRs. Current literature on anticoagulation options for patients who present with these conditions as well as alternate laboratory assays are reviewed. APS can present a unique complexity and challenge to appropriate anticoagulation on warfarin. Although there are emerging data regarding the use of novel oral anticoagulants to treat this condition, they do not justify their use in a patient with APS and an MVR because of a current lack of evidence. CFX testing may be used to calibrate INRs when there is a concern for false readings because of lupus anticoagulant interaction with INR assays.
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21
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Favresse J, Lardinois B, Sabor L, Devalet B, Vandepapeliere J, Braibant M, Lessire S, Chatelain B, Jacqmin H, Douxfils J, Mullier F. Evaluation of the DOAC-Stop® Procedure to Overcome the Effect of DOACs on Several Thrombophilia Screening Tests. TH OPEN 2018; 2:e202-e209. [PMID: 31249943 PMCID: PMC6524876 DOI: 10.1055/s-0038-1657785] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/21/2018] [Indexed: 11/04/2022] Open
Abstract
The impact of direct oral anticoagulants (DOACs) on laboratory assays used for thrombophilia testing (e.g., antithrombin, protein S, protein C, lupus anticoagulant and activated protein-C resistance) is a well-known issue and may cause false-positive and -negative results. Therefore, the correct interpretation of tests that are performed in patients taking DOACs is mandatory to prevent misclassification and the subsequent clinical consequences. We aimed at evaluating the efficiency of a new and simple procedure (DOAC-Stop®; Haematex Research, Hornsby, Australia) to overcome the effect of all DOACs in real-life settings and to assess the percentage of erroneous results due to the presence of DOACs on thrombophilia screening tests. For this purpose, 135 DOAC-treated patients (38 apixaban, 40 dabigatran, 15 edoxaban, and 42 rivaroxaban) and 20 control patients were enrolled. A significant drop in apixaban, dabigatran, edoxaban, and rivaroxaban plasma concentrations following the DOAC-Stop® treatment was observed (74.8–8.2 ng/mL [
p
< 0.0001], 95.9–4.7 ng/mL [
p
< 0.0001], 102.1–8.8 ng/mL [
p
= 0.001], and 111.3–7.0 ng/mL [
p
< 0.0001], respectively). The DOAC-Stop® treatment was mostly effective to overcome the effect of DOACs on PTT-LA, dilute Russell's viper venom time (dRVVT) screen, and dRVVT confirm tests. Using our procedures, false-positive results due to DOACs were observed only with lupus anticoagulant tests (up to 75%) and fell to zero after the DOAC-Stop® procedure, regardless of the DOAC considered. In conclusion, the DOAC-Stop® adsorbent procedure appeared to be an effective and simple way to overcome the interference of DOAC on coagulation tests and should facilitate the interpretation of thrombophilia screening tests in patients taking DOACs.
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Affiliation(s)
- Julien Favresse
- Université Catholique de Louvain, CHU UCL Namur, Hematology Laboratory, Namur Thrombosis and Hemostasis Center, NARILIS, Yvoir, Belgium
| | - Benjamin Lardinois
- Université Catholique de Louvain, CHU UCL Namur, Hematology Laboratory, Namur Thrombosis and Hemostasis Center, NARILIS, Yvoir, Belgium
| | - Lina Sabor
- Université Catholique de Louvain, CHU UCL Namur, Hematology Laboratory, Namur Thrombosis and Hemostasis Center, NARILIS, Yvoir, Belgium
| | - Bérangère Devalet
- Department of Hematology, CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Université Catholique de Louvain, Yvoir, Belgium
| | - Julie Vandepapeliere
- Department of Hematology, CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Université Catholique de Louvain, Yvoir, Belgium
| | - Maximilien Braibant
- Department of Pharmacy, CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Université Catholique de Louvain, Yvoir, Belgium
| | - Sarah Lessire
- Department of Anesthesiology, CHU UCL Namur, Namur Thrombosis and Hemostasis Center, Université Catholique de Louvain, Yvoir, Belgium
| | - Bernard Chatelain
- Université Catholique de Louvain, CHU UCL Namur, Hematology Laboratory, Namur Thrombosis and Hemostasis Center, NARILIS, Yvoir, Belgium
| | - Hugues Jacqmin
- Université Catholique de Louvain, CHU UCL Namur, Hematology Laboratory, Namur Thrombosis and Hemostasis Center, NARILIS, Yvoir, Belgium
| | - Jonathan Douxfils
- Department of Pharmacy, Namur Thrombosis and Hemostasis Center, Université de Namur, Yvoir, Belgium.,QUALIblood SA, Namur, Belgium
| | - François Mullier
- Université Catholique de Louvain, CHU UCL Namur, Hematology Laboratory, Namur Thrombosis and Hemostasis Center, NARILIS, Yvoir, Belgium
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22
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Davis KA, Davis DO. Direct acting oral anticoagulants for the treatment of suspected heparin-induced thrombocytopenia. Eur J Haematol 2017; 99:332-335. [DOI: 10.1111/ejh.12921] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Kyle A. Davis
- Department of Pharmacy; Wake Forest Baptist Medical Center; Winston-Salem NC USA
| | - Daphne O. Davis
- Department of Pharmacy; Wake Forest Baptist Medical Center; Winston-Salem NC USA
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23
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Abstract
Direct oral anticoagulants (DOACs) are attractive options for treatment of heparin-induced thrombocytopenia (HIT). We report our continuing experience in Hamilton, ON, Canada, since January 1, 2015 (when we completed our prospective study of rivaroxaban for HIT), using rivaroxaban for serologically confirmed HIT (4Ts score ≥4 points; positive platelet factor 4 [PF4]/heparin immunoassay, positive serotonin-release assay). We also performed a literature review of HIT treatment using DOACs (rivaroxaban, apixaban, dabigatran, edoxaban). We focused on patients who received DOAC therapy for acute HIT as either primary therapy (group A) or secondary therapy (group B; initial treatment using a non-DOAC/non-heparin anticoagulant with transition to a DOAC during HIT-associated thrombocytopenia). Our primary end point was occurrence of objectively documented thrombosis during DOAC therapy for acute HIT. We found that recovery without new, progressive, or recurrent thrombosis occurred in all 10 Hamilton patients with acute HIT treated with rivaroxaban. Data from the literature review plus these new data identified a thrombosis rate of 1 of 46 patients (2.2%; 95% CI, 0.4%-11.3%) in patients treated with rivaroxaban during acute HIT (group A, n = 25; group B, n = 21); major hemorrhage was seen in 0 of 46 patients. Similar outcomes in smaller numbers of patients were observed with apixaban (n = 12) and dabigatran (n = 11). DOACs offer simplified management of selected patients, as illustrated by a case of persisting (autoimmune) HIT (>2-month platelet recovery with inversely parallel waning of serum-induced heparin-independent serotonin release) with successful outpatient rivaroxaban management of HIT-associated thrombosis. Evidence supporting efficacy and safety of DOACs for acute HIT is increasing, with the most experience reported for rivaroxaban.
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24
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Tran PN, Tran MH. Emerging Role of Direct Oral Anticoagulants in the Management of Heparin-Induced Thrombocytopenia. Clin Appl Thromb Hemost 2017; 24:201-209. [PMID: 28301915 DOI: 10.1177/1076029617696582] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Heparin-induced thrombocytopenia (HIT) and heparin-induced thrombocytopenia with thrombosis (HITT) are rare but potentially limb- and life-threatening complications of heparin therapy. Continuation of heparin or low-molecular-weight heparin is contraindicated due to platelet activation in the presence of (heparin-dependent) HIT antibodies. Primary treatment options currently include argatroban, fondaparinux, or bivalirudin. However, the parenteral administration routes and interference of argatroban with traditional coagulation markers complicate management. The goal of this review is to assess the viability of direct oral anticoagulants as an alternative treatment option in patients with HIT/HITT. Their use in HIT/HITT is reasonable, given absent cross-reactivity preformed with HIT antibodies. Furthermore, their rapid onset of action and induction of effective anticoagulation provide a favorable basis for their use in this condition. Herein, we summarize 3 studies and 8 case reports comprising 56 patients in whom direct oral anticoagulants were used in the treatment of HIT/HITT.
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Affiliation(s)
- Phu Ngoc Tran
- 1 Division of Hematology-Oncology, Department of Medicine, Chao Family Comprehensive Cancer Center, University of California Irvine School of Medicine, Orange, CA, USA
| | - Minh-Ha Tran
- 2 Department of Pathology and Laboratory Medicine, University of California Irvine School of Medicine, Irvine, CA, USA.,3 Department of Internal Medicine, University of California Irvine School of Medicine, Irvine, CA, USA
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