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Reversal agents for novel anticoagulants

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https://www.readbyqxmd.com/read/29117993/an-update-on-the-bleeding-risks-associated-with-doacs
#1
(no author information available yet)
The direct oral anticoagulants (DOACs), also referred to as novel (or non-vitamin K antagonist) oral anticoagulants (NOACs), represent a major development in anticoagulation therapy due to their rapid onset of action, predictable dose-response with fixed doses and limited interactions with food and drugs.(1,2) However, these agents have been in widespread clinical use for less than a decade and, compared with extensive experience with warfarin, there is uncertainty relating to optimal laboratory monitoring of anticoagulation, perioperative management and treatment of bleeding...
November 2017: Drug and Therapeutics Bulletin
https://www.readbyqxmd.com/read/29071124/management-of-anticoagulation-in-hip-fractures-a-pragmatic-approach
#2
Rafik Yassa, Mahdi Yacine Khalfaoui, Ihab Hujazi, Hannah Sevenoaks, Paul Dunkow
Hip fractures are common and increasing with an ageing population. In the United Kingdom, the national guidelines recommend operative intervention within 36 hours of diagnosis. However, long-term anticoagulant treatment is frequently encountered in these patients which can delay surgical intervention. Despite this, there are no set national standards for management of drug-induced coagulopathy pre-operatively in the context of hip fractures.The aim of this study was to evaluate the management protocols available in the current literature for the commonly encountered coagulopathy-inducing agents...
September 2017: EFORT Open Reviews
https://www.readbyqxmd.com/read/28662704/thrombocytopenia-induced-by-dabigatran-two-case-reports
#3
Hyun Goo Kang, Seung Jae Lee, Ji Yeon Chung, Jin Sung Cheong
BACKGROUND: Vitamin K inhibitors (e.g. warfarin) and indirect thrombin inhibitors (e.g. heparin) are widely used to prevent thromboembolic disorders (e.g. myocardial infarction, venous thromboembolism, and stroke). These agents have been mainstays of anticoagulation for people older than 60 years. However, their administration is associated with a risk of bleeding and requires careful monitoring of patients. Novel oral anticoagulants (NOACs), such as dabigatran, are significantly safer in preventing thromboembolism than warfarin and heparin (sporadically causes thrombocytopenia) and are more specific for their target protein, thrombin...
June 29, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28552276/adjuncts-to-blood-component-therapies-for-the-treatment-of-bleeding-in-the-intensive-care-unit
#4
REVIEW
Jerrold H Levy, Kamrouz Ghadimi, Quintin J Quinones, Raquel R Bartz, Ian Welsby
Patients who are critically ill following surgical or traumatic injury often present with coagulopathy as a component of the complex multisystem dysfunction that clinicians must rapidly diagnose and treat in the intensive care environment. Failure to recognize coagulopathy while volume resuscitation with crystalloid or colloid takes place, or an unbalanced transfusion strategy focused on packed red blood cell transfusion can all significantly worsen coagulopathy, leading to increased transfusion requirements and poor outcomes...
October 2017: Transfusion Medicine Reviews
https://www.readbyqxmd.com/read/28471371/the-reversal-of-direct-oral-anticoagulants-in-animal-models
#5
Markus Honickel, Necib Akman, Oliver Grottke
Several direct oral anticoagulants (DOACs), including direct thrombin and factor Xa inhibitors, have been approved as alternatives to vitamin K antagonist anticoagulants. As with any anticoagulant, DOAC use carries a risk of bleeding. In patients with major bleeding or needing urgent surgery, reversal of DOAC anticoagulation may be required, presenting a clinical challenge. The optimal strategy for DOAC reversal is being refined, and may include use of hemostatic agents such as prothrombin complex concentrates (PCCs; a source of concentrated clotting factors), or DOAC-specific antidotes (which bind their target DOAC to abrogate its activity)...
August 2017: Shock
https://www.readbyqxmd.com/read/28373761/gastrointestinal-bleeding-in-patients-on-novel-oral-anticoagulants-risk-prevention-and-management
#6
REVIEW
Ka-Shing Cheung, Wai K Leung
Novel oral anticoagulants (NOACs), which include direct thrombin inhibitor (dabigatran) and direct factor Xa inhibitors (rivaroxaban, apixaban and edoxaban), are gaining popularity in the prevention of embolic stroke in non-valvular atrial fibrillation as well as in the prevention and treatment of venous thromboembolism. However, similar to traditional anticoagulants, NOACs have the side effects of bleeding, including gastrointestinal bleeding (GIB). Results from both randomized clinical trials and observations studies suggest that high-dose dabigatran (150 mg b...
March 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28282497/andexanet-alfa-for-the-reversal-of-anticoagulant-activity-in-patients-treated-with-direct-and-indirect-factor-xa-inhibitors
#7
REVIEW
Tarek Nafee, Aysha Aslam, Gerald Chi, Seyedmahdi Pahlavani, Dima Nimri, Aravind Reddy Kuchkuntla, Usama Talib, Nathan Michalak, Yazan Daaboul, Serge Korjian, Anthony Gallo, C Michael Gibson
Andexanet alfa is a recombinant factor Xa decoy molecule that inhibits direct and indirect factor Xa inhibitors to allow the normal coagulation process to resume. Its development arises in a space where novel oral anticoagulants are receiving expanded indications yet their use is limited by the lack of an effective reversal agent. Areas covered: This article reviews the biochemical properties, mechanism of action and the preclinical and clinical trials on andexanet alfa. It additionally aims to provide expert commentary and future perspectives on the efficacy, safety and challenges facing andexanet alfa as a universal antidote for direct and indirect factor Xa inhibitors...
April 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28277769/reversal-of-direct-oral-anticoagulants
#8
REVIEW
X-Y Zhang, M J Desborough, S Shapiro
An understanding of how to counteract the anticoagulant effect of direct oral anticoagulants is essential in the event of haemorrhage, emergency surgery and overdose. This review summarizes strategies for the reversal of direct oral anticoagulants, including the use of novel agents.
March 2, 2017: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/28270004/-the-first-use-of-iv-idarucizumab-for-dabigatran-reversal-in-hungary
#9
Lajos Driesz, Éva Barabás, Ildikó Bodócs, Zoltán Szántó, György Herr, Gábor Bencsik, László Pál, József Borbola
At present, the direct thrombin inhibitor dabigatran is the only one amongst the new direct anticoagulants which has an effective, specific reversal agent. The novel agent idarucizumab is a humanized, monoclonal antibody fragment binds to dabigatran within minutes thereby offers an opportunity to induce a safe, long-lasting reverse of the anticoagulant effects of dabigatran. The authors describe the first use of idarucizumab in Hungary (23. 05. 2016) in an old female patient with non-valvular paroxysmal atrial fibrillation of high stroke risk-score and renal dysfunction who was taking dabigatran (2 x 110 mg/day) when an acute abdomen developed requiring emergency cholecystectomy...
March 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28210454/managing-patients-taking-edoxaban-in-dentistry
#10
REVIEW
Adrian Curto, Daniel Curto, Jorge Sanchez
BACKGROUND: Anticoagulation therapy is used in several conditions to prevent or treat thromboembolism. A new group of oral anticoagulants with clear advantages over classic dicoumarin oral anticoagulants (warfarin and acenocoumarol) has been developed in recent years. The Food and Drug Administration has approved edoxaban, dabigatran, rivaroxaban and apixaban. Their advantages include: predictable pharmacokinetics, drug interactions and limited food, rapid onset of action and short half-life...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28097231/protein-disulfide-isomerase-inhibition-blocks-thrombin-generation-in-humans-by-interfering-with-platelet-factor-v-activation
#11
Jack D Stopa, Donna Neuberg, Maneka Puligandla, Bruce Furie, Robert Flaumenhaft, Jeffrey I Zwicker
BACKGROUND: Protein disulfide isomerase (PDI) is required for thrombus formation. We previously demonstrated that glycosylated quercetin flavonoids such as isoquercetin inhibit PDI activity and thrombus formation in animal models, but whether extracellular PDI represents a viable anticoagulant target in humans and how its inhibition affects blood coagulation remain unknown. METHODS: We evaluated effects of oral administration of isoquercetin on platelet-dependent thrombin generation in healthy subjects and patients with persistently elevated anti-phospholipid antibodies...
January 12, 2017: JCI Insight
https://www.readbyqxmd.com/read/27803506/role-of-novel-oral-anticoagulants-in-the-treatment-of-antiphospholipid-syndrome
#12
C Whitney White, Angela R Thomason, Katie Boyd
Background: Antiphospholipid syndrome (APS) is an autoimmune disease characterized by thrombosis or pregnancy loss with persistent positive antibodies. Standard treatment for APS with history of thromboembolism is heparin or low-molecular-weight heparin followed by a vitamin K antagonist (VKA). Novel oral anticoagulants (NOACs) could be effective in patients with APS, but none carry indications for treatment related to APS. Clinical Evidence: Five case reports or series with rivaroxaban and dabigatran suggest thrombotic events occur most often in the higher risk population (arterial thrombosis and/or triple positive antibodies) or in patients who had recurrent VTEs on warfarin therapy...
October 2016: Hospital Pharmacy
https://www.readbyqxmd.com/read/27727040/idarucizumab-for-reversal-of-dabigatran-associated-bleeding-misnomer-or-miracle
#13
Luke Miller, Jason A Ferreira, Calvin Tucker
BACKGROUND: The development of novel oral anticoagulants (NOACs) has revolutionized oral anticoagulation. Rapid incorporation of NOACs into general practice has heightened the demand for directed reversal agents. Idarucizumab is a targeted reversal agent that is approved for the urgent reversal of the anticoagulant effects of dabigatran. While it is a welcome addition to reversal strategies of dabigatran, a number of clinical questions exist regarding its place in therapy. OBJECTIVE: We describe controversies regarding the use of idarucizumab therapy in patients with dabigatran-associated bleeding...
March 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27697442/discontinuation-and-management-of-direct-acting-anticoagulants-for-emergency-procedures
#14
REVIEW
Jerrold H Levy
Patients taking direct oral anticoagulants (DOACs) who then need an emergency invasive procedure require specialized management strategies. Appropriate patient evaluation includes assessment of the current anticoagulation state, including timing of the last dose. DOACs require particular coagulation assays to measure anticoagulation levels accurately, although standard coagulation screening tests may provide qualitative guidance. Specialty societies have endorsed general recommendations for patient management to promote hemostasis in anticoagulated patients requiring surgery or other invasive procedures...
November 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27697438/idarucizumab-and-factor-xa-reversal-agents-role-in-hospital-guidelines-and-protocols
#15
REVIEW
Menno V Huisman, John Fanikos
As expected with all antithrombotic agents, there is a risk of bleeding complications in patients receiving direct oral anticoagulants (DOACs) because of the DOAC itself, acute trauma, invasive procedures, or underlying comorbidities. For many bleeding events, a prudent course of action will be to withdraw the DOAC, then "wait and support" the patient, with the expectation that the bleeding event should resolve with time. Likewise, DOAC therapy may be interrupted ahead of a planned procedure, the stopping time being dependent on the agent involved and the patient's renal function...
November 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27659071/nonvitamin-k-antagonist-oral-anticoagulant-activity-challenges-in-measurement-and-reversal
#16
REVIEW
Karen S Brown, Hamim Zahir, Michael A Grosso, Hans J Lanz, Michele F Mercuri, Jerrold H Levy
BACKGROUND: Four nonvitamin K antagonist oral anticoagulants (NOACs) are approved for the prevention of stroke in patients with nonvalvular atrial fibrillation and for the treatment of venous thromboembolism. These include the direct thrombin inhibitor dabigatran and the direct factor Xa inhibitors rivaroxaban, apixaban, and edoxaban. Bleeding is a complication for all anticoagulants and concerns regarding bleeding risk and the suitability of effective reversal strategies may be a barrier to their prescription...
September 23, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27626268/-antidotes-to-novel-direct-oral-anticoagulants
#17
REVIEW
N G Khorev, A P Momot, V O Kon'kova
During the last 10 years, several novel direct oral anticoagulants (NOACs) have entered the clinical arena and were registered in the Russian Federation for use in patients presenting with atrial fibrillation, venous thrombosis, and pulmonary artery thromboembolism. NOACs are classified into two groups: direct thrombin inhibitor (notably dabigatran) and factor Xa inhibitors (including rivaroxaban, apixaban, and edoxaban). Their disadvantage is lack of specific antidotes in case of an emergency situation (injury, infarction, stroke requiring thrombolysis, urgent operation)...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27594818/novel-oral-anticoagulants-for-venous-thromboembolism-with-special-emphasis-on-risk-of-hemorrhagic-complications-and-reversal-agents
#18
Zaheer Ahmed, Seemeen Hassan, Gary A Salzman
Warfarin was the only oral anticoagulant available for the treatment of venous thromboembolism for about half a century until the recent approval of novel oral agents dabigatran, rivoraxaban and apixaban. This presents new classes of medications less cumbersome to use. They do not require frequent laboratory monitoring or have nurmerous drug interactions. On the other hand it also poses a challenge to the physicians deciding which agent to use in specific patient populations, how to predict the bleeding risk compared to warfarin and between the different novel agents and how to manage bleeding with relatively recent discovery of few potential antidotes...
April 2016: Current Drug Therapy
https://www.readbyqxmd.com/read/27569675/discontinuation-and-management-of-direct-acting-anticoagulants-for-emergency-procedures
#19
REVIEW
Jerrold H Levy
Patients taking direct oral anticoagulants (DOACs) who then need an emergency invasive procedure require specialized management strategies. Appropriate patient evaluation includes assessment of the current anticoagulation state, including timing of the last dose. DOACs require particular coagulation assays to measure anticoagulation levels accurately, although standard coagulation screening tests may provide qualitative guidance. Specialty societies have endorsed general recommendations for patient management to promote hemostasis in anticoagulated patients requiring surgery or other invasive procedures...
November 2016: American Journal of Medicine
https://www.readbyqxmd.com/read/27569673/idarucizumab-and-factor-xa-reversal-agents-role-in-hospital-guidelines-and-protocols
#20
REVIEW
Menno V Huisman, John Fanikos
As expected with all antithrombotic agents, there is a risk of bleeding complications in patients receiving direct oral anticoagulants (DOACs) because of the DOAC itself, acute trauma, invasive procedures, or underlying comorbidities. For many bleeding events, a prudent course of action will be to withdraw the DOAC, then "wait and support" the patient, with the expectation that the bleeding event should resolve with time. Likewise, DOAC therapy may be interrupted ahead of a planned procedure, the stopping time being dependent on the agent involved and the patient's renal function...
November 2016: American Journal of Medicine
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