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Direct oral anticoagulant, DOAC

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https://www.readbyqxmd.com/read/28331354/utilization-and-prescribing-patterns-of-direct-oral-anticoagulants
#1
Maegan M Whitworth, Krystal K Haase, David S Fike, Ravindra M Bharadwaj, Rodney B Young, Eric J MacLaughlin
BACKGROUND: Scant literature exists evaluating utilization patterns for direct oral anticoagulants (DOACs). OBJECTIVES: The primary objective was to assess DOAC prescribing in patients with venous thromboembolism (VTE) and nonvalvular atrial fibrillation (NVAF) in outpatient clinics. Secondary objectives were to compare utilization between family medicine (FM) and internal medicine (IM) clinics, characterize potentially inappropriate use, and identify factors associated with adverse events (AEs)...
2017: International Journal of General Medicine
https://www.readbyqxmd.com/read/28328524/paramagnetic-micro-particles-as-a-tool-for-rapid-quantification-of-apixaban-dabigatran-edoxaban-and-rivaroxaban-in-human-plasma-by-uhplc-ms-ms
#2
Martin H J Wiesen, Cornelia Blaich, Thomas Streichert, Guido Michels, Carsten Müller
BACKGROUND: Assessment of the anticoagulant activity of direct oral anticoagulants (DOACs) is justified in special clinical situations. Here, we evaluated two independent extraction methods and developed a multi-analyte ultra-high performance liquid chromatography tandem mass (UHPLC-MS/MS) method for the quantification of apixaban, dabigatran, edoxaban and rivaroxaban in human plasma. METHODS: Routine extraction based on protein precipitation with acetonitrile and subsequent centrifugation was compared to sample clean-up using commercial paramagnetic micro-particles and subsequent magnetic depletion...
March 22, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28326589/risk-of-myocardial-infarction-in-patients-with-atrial-fibrillation-using-vitamin-k-antagonists-aspirin-or-direct-acting-oral-anticoagulants
#3
Leo M Stolk, Frank de Vries, Chiel Ebbelaar, Anthonius de Boer, Tom Schalekamp, Patrick Souverein, Arina Ten Cate-Hoek, Andrea M Burden
AIM: Direct-acting oral anticoagulants (DOACs) have become available for the prevention of stroke in patients with atrial fibrillation (AF). Conflicting results have been published on the risk of acute myocardial infarction (AMI) with the use of DOACs in comparison with vitamin K antagonists (VKAs). The objective of the present study was to evaluate the risk of AMI in patients with AF who are exposed to either VKAs, DOACs or low-dose (< 325 mg) aspirin. METHODS: We conducted a population-based cohort study using data from the Clinical Practice Research Datalink (2008-2014)...
March 22, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28296069/thrombotic-and-bleeding-outcomes-following-perioperative-interruption-of-direct-oral-anticoagulants-in-patients-with-venous-thromboembolic-disease
#4
J Shaw, C de Wit, G Le Gal, M Carrier
BACKGROUND: Direct Oral Anticoagulants (DOACs) are increasingly being used in the setting of venous thromboembolic disease (VTE). There is little evidence to guide the peri-procedural interruption of DOACs in this patient population. A number of studies have evaluated the perioperative interruption of DOACs based on half-life of the anticoagulant and the underlying procedural bleeding risk in patient with atrial fibrillation, but it remains unclear whether these findings can be extended to patients with VTE...
March 12, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28295638/effect-of-direct-oral-anticoagulants-on-the-risk-of-delayed-bleeding-after-gastric-endoscopic-submucosal-dissection
#5
Toshiyuki Yoshio, Hideomi Tomida, Ryuichiro Iwasaki, Yusuke Horiuchi, Masami Omae, Akiyoshi Ishiyama, Toshiaki Hirasawa, Yorimasa Yamamoto, Tomohiro Tsuchida, Junko Fujisaki, Takuya Yamada, Eiji Mita, Tomoyuki Ninomiya, Kojiro Michitaka, Masahiro Igarashi
OBJECTIVES: Anticoagulants are used to prevent thromboembolic event. Direct oral anticoagulants (DOACs) are our new choice; however, their effect on the bleeding risk for endoscopic treatment has not been reported. We aimed to assess the clinical effect of DOACs compared to warfarin for gastric endoscopic submucosal dissection (ESD). METHODS: We retrospectively studied 97 patients on anticoagulants treated 108 gastric neoplasms with ESD in three referral institutes...
March 10, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28287377/use-of-dabigatran-and-rivaroxaban-in-non-valvular-atrial-fibrillation-one-year-follow-up-experience-in-an-italian-centre
#6
Mario Schiavoni, Maurizio Margaglione, Antonella Coluccia
BACKGROUND: Direct oral anticoagulants (DOAC) have been shown to be non-inferior to traditional vitamin K antagonists in preventing stroke and arterial thromboembolism in patients with non-valvular atrial fibrillation. Nevertheless, it is mandatory to record side effects and individual adherence to DOAC treatment. MATERIALS AND METHODS: In this single-centre experience, patients with non-valvular atrial fibrillation were prospectively observed after switching from a vitamin K antagonist to dabigatran or rivaroxaban...
January 31, 2017: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/28286749/factors-xi-and-xii-as-targets-for-new-anticoagulants
#7
REVIEW
Jeffrey I Weitz, James C Fredenburgh
Compared with vitamin K antagonists, the direct oral anticoagulants (DOACs) are simpler to administer and are associated with less intracranial bleeding. Nonetheless, even with the DOACs, bleeding still occurs and many patients with atrial fibrillation fail to receive anticoagulant thromboprophylaxis because of the fear of bleeding. Therefore, there is an urgent need for safer anticoagulants. Recent investigations into the biochemistry of hemostasis and thrombosis have identified new targets for development of novel anticoagulants...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28282497/andexanet-alfa-for-the-reversal-of-anticoagulant-activity-in-patients-treated-with-direct-and-indirect-factor-xa-inhibitors
#8
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...
March 22, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28276323/preference-for-direct-oral-anticoagulants-in-patients-treated-with-vitamin-k-antagonists-for-venous-thromboembolism
#9
M P A Brekelmans, M Kappelhof, P T Nieuwkerk, M Nierman, H R Buller, M Coppens
BACKGROUND: Direct oral anticoagulants (DOACs) are an alternative for vitamin K antagonists (VKA) in the treatment and prevention of venous thromboembolism (VTE). Patient preferences for treatment options have not been extensively explored. METHODS: A random sample of 200 patients was obtained from those treated with VKA for deep vein thrombosis, pulmonary embolism or both at the Thrombosis Service Amsterdam. Preference for DOACs relative to VKA was assessed using a treatment trade-off technique administered as a questionnaire sent to all patients...
March 2017: Netherlands Journal of Medicine
https://www.readbyqxmd.com/read/28272725/-comparison-of-the-cost-utility-of-direct-oral-anticoagulants-for-the-prevention-of-stroke-in-patients-with-atrial-fibrillation-in-spain
#10
M Monreal-Bosch, S Soulard, C Crespo, S Brand, A Kansal
INTRODUCTION: Apixaban, dabigatran and rivaroxaban are three new direct oral anticoagulants (DOACs) used in the prevention of stroke and systemic embolism in patients with non-valvular atrial fibrillation (NVAF) in Spain. AIM: To assess the relative cost-utility of the three DOACs compared with vitamin K antagonists. PATIENTS AND METHODS: A Markov model with 3-month cycles was used to simulate NVAF patients starting with treatment and followed up for their lifetime from the perspective of the National Health System...
March 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28271315/appropriateness-of-direct-oral-anticoagulant-dosing-for-venous-thromboembolism-treatment
#11
Emmeline Tran, Ashley Duckett, Sarah Fisher, Nicole Bohm
Adherence to FDA-approved dosing for the direct oral anticoagulants (DOACs) based on renal function, hepatic function, and concomitant medications in a real-world setting has not been evaluated. The purpose of this retrospective cohort analysis was to determine the prescribing accuracy of DOAC dosing for venous thromboembolism (VTE) treatment compared with enoxaparin. The secondary outcomes were to describe the incidence of in-hospital VTE recurrence and bleeding on DOAC therapy. The study included 168 patients with 261 admissions for the DOAC group and 639 patients with 841 admissions for the enoxaparin group...
March 7, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/28249326/laboratory-assessment-of-direct-oral-anticoagulants
#12
Jonathan Douxfils, Robert C Gosselin
Oral vitamin K anticoagulation (warfarin, Coumadin, coumarin) has long been used for long-term treatment and prophylaxis in a variety of clinical settings. Given the unpredictable pharmacokinetic and food impact of warfarin, episodic monitoring is required. Since the early 2000s, direct oral anticoagulants (DOACs) entered into clinical trials as a potential alternative strategy to oral vitamin K antagonists for long-term anticoagulation. As these drugs have predictable pharmacokinetics and pharmacodynamics, there was no requirement for episodic or routine monitoring...
March 1, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28239301/the-reversal-effect-of-prothrombin-complex-concentrate-pcc-activated-pcc-and-recombinant-activated-factor-vii-against-anticoagulation-of-xa-inhibitor
#13
Nina Haagenrud Schultz, Hoa Thi Tuyet Tran, Stine Bjørnsen, Carola Elisabeth Henriksson, Per Morten Sandset, Pål Andre Holme
BACKGROUND: An increasing number of patients are treated with direct-acting oral anticoagulants (DOACs), but the optimal way to reverse the anticoagulant effect is not known. Specific antidotes are not available and prothrombin complex concentrate (PCC), activated PCC (aPCC) and recombinant factor VIIa (rFVIIa) are variously used as reversal agents in case of a major bleeding. We aimed to determine the most effective haemostatic agent and dose to reverse the effect of rivaroxaban in blood samples from patients taking rivaroxaban for therapeutic reasons...
2017: Thrombosis Journal
https://www.readbyqxmd.com/read/28222250/long-term-treatment-of-cancer-associated-thrombosis-the-choice-of-the-optimal-anticoagulant
#14
REVIEW
I Elalamy, I Mahé, W Ageno, G Meyer
Patients with cancer associated thrombosis (CAT) carry a higher risk of recurrence, bleeding and mortality as compared to non-cancer patients. The specific profile of cancer patients combining frequent co-morbidities, the use of anti-tumoral therapies and the cancer progression itself represent a major therapeutic challenge for choosing a long-term anticoagulant treatment. This review discusses the practical basis of that choice among available drugs for the long-term antithrombotic strategy linked to their pharmacology, mechanism of action, evidence of clinical benefits, advantages and limitations in such a complex clinical context...
February 21, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28219635/direct-oral-anticoagulant-or-warfarin-related-major-bleeding-characteristics-reversal-strategies-and-outcomes-from-a-multi-center-observational-study
#15
Yan Xu, Sam Schulman, Dar Dowlatshahi, Anne M Holbrook, Christopher S Simpson, Lois E Shepherd, Philip S Wells, Antonio Giulivi, Tara Gomes, Muhammad Mamdani, Wayne Khuu, Eliot Frymire, Ana P Johnson
BACKGROUND: Direct oral anticoagulants (DOACs) have expanded the armamentarium for antithrombotic therapy. While DOAC-related major bleeds were associated with favourable outcomes compared to warfarin in clinical trials, warfarin was reversed in <40% of cases, raising concerns about the generalizability of this finding. METHODS: Consecutive patients ≥66 years presenting to five tertiary care hospitals across three cities in Ontario, Canada with diagnoses that included hemorrhage from October 2010 to March 2015...
February 17, 2017: Chest
https://www.readbyqxmd.com/read/28215696/recurrent-venous-thrombosis-under-rivaroxaban-and-carbamazepine-for-symptomatic-epilepsy
#16
Claudia Stöllberger, Josef Finsterer
BACKGROUND: The direct oral anticoagulant (DOAC) rivaroxaban, an oral Factor Xa inhibitor, is increasingly used as an alternative to vitamin-K-antagonists (VKAs). Absorption and elimination of DOACs are dependent on the permeability glycoprotein (P-gp) efflux transporter protein system, and DOACs are substrates of the hepatic cytochrome P 450 3A4 (CYP3A4) enzymes. Therefore, drug-interactions may occur when DOACs are administered with drugs affecting the activity of P-gp or CYP3A4 systems...
February 3, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28208197/reversal-of-direct-oral-anticoagulants-current-status-and-future-directions
#17
Jeffrey I Weitz
Direct oral anticoagulants (DOACs) are increasingly used for prevention and treatment of venous thromboembolism and for prevention of stroke in patients with nonvalvular atrial fibrillation. In phase III clinical trials that included more than 100,000 patients, the DOACs were at least as effective as vitamin K antagonists (VKAs) and were associated with less serious bleeding, particularly less intracranial bleeding. Real-world evidence supports these outcomes. Despite this, some physicians and patients are concerned about serious bleeding or emergencies unless specific reversal agents for the DOACs are available...
February 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28208196/the-novel-oral-anticoagulants-for-acute-venous-thromboembolism-is-warfarin-dead
#18
Alexander T Cohen, Serena Granziera, Nicola Veronese, Giacomo Zoppellaro
The direct oral anticoagulants (DOACs) have been compared with parenteral anticoagulants and vitamin K antagonists (VKAs) for the treatment of venous thromboembolism (VTE) in several robust studies. DOACs have shown similar efficacy in preventing recurrent VTE and significant reductions in critical site (intracranial) bleeding, fatal bleeding, major and nonmajor bleeding. Warfarin and other VKAs are not dead as treatment modalities for VTE. A better way to describe the current situation is to use a boxing expression, "down but not out...
February 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28198201/clinical-implications-of-reversal-agents-for-direct-oral-anticoagulants
#19
Sarah Monagle, John W Eikelboom, Kuan H Ng, Vinai C Bhagirath
Direct oral anticoagulants (DOACs) are effective in preventing and treating venous thromboembolism, and preventing stroke in atrial fibrillation. Until recently, there has been no specific reversal agent for DOACs. Now, a specific antidote for the direct thrombin inhibitor, dabigatran has been approved for use, and antidotes for factor Xa inhibitors (rivaroxaban, apixaban and edoxaban) are being developed. We review the evidence for currently used and emerging reversal strategies, and discuss possible clinical implications, including increased prescription of DOACs, use of DOACs in clinical situations previously felt to pose too great a risk of bleeding, and use of reversal agents beyond currently approved indications...
March 2017: Future Cardiology
https://www.readbyqxmd.com/read/28197755/direct-oral-anticoagulants-for-extended-duration-thromboprophylaxis-in-hospitalized-medically-ill-patients-are-we-there-yet
#20
Majed S Al Yami, Osamah M Alfayez, Sawsan M Kurdi, Razan Alsheikh
Despite a recommended 7-10 days of thromboprophylaxis, medically ill patients remain at increased risk of developing venous thromboembolism (VTE) after hospital discharge. Here, we present a contemporary review on the efficacy and safety of extended-duration thromboprophylaxis with direct oral anticoagulants (DOACs) in hospitalized medically ill patients. A search of publication and trial databases of controlled trials conducted from 2010 to 2016 using the key terms apixaban, rivaroxaban, and betrixaban showed three phase III trials that met our search criteria...
February 14, 2017: Journal of Thrombosis and Thrombolysis
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