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Atrial fibrilation , Dabigatran, apixaban, rivaroxaban

Sophie Testa, Oriana Paoletti, Cristina Legnani, Claudia Dellanoce, Emilia Antonucci, Benilde Cosmi, Vittorio Pengo, Daniela Poli, Rossella Morandini, Roberto Testa, Armando Tripodi, Gualtiero Palareti
BACKGROUND: Direct oral anticoagulants(DOACs) are administered at fixed dose without need for dose adjustment by lab testing. A high inter-individual variability in the drug blood levels was shown with all DOACs. To evaluate a possible relationship between DOAC C-trough anticoagulant levels and thromboembolic events,565 consecutivenaïve patients withatrial fibrillation (AF), were enrolled in this study performed within the START-Laboratory Registry. METHODS: DOAC specific measurements [diluted thrombin time (dTT) or anti-FIIa calibrated for dabigatran; anti-FXa calibrated for rivaroxaban or apixaban] at C-trough were performed locally at steady state within 15-25 days from starting treatment...
March 12, 2018: Journal of Thrombosis and Haemostasis: JTH
John Burn, Munir Pirmohamed
About 1.4 British million people are at risk of strokes due to non-valvular atrial fibrillation (AF) necessitating long-term anticoagulation. The vitamin K antagonist, warfarin, has a long half-life and narrow therapeutic range necessitating regular monitoring and is a common cause of iatrogenic hospital admission. Direct-acting oral anticoagulants (DOACs), dabigatran, rivaroxaban, apixaban and edoxaban are not required to have monitoring but are sensitive to changes in renal function and are associated with poorer adherence...
2018: Open Heart
Jordanne Feldberg, Param Patel, Ashley Farrell, Sylvia Sivarajahkumar, Karen Cameron, Jennifer Ma, Marisa Battistella
Background: There is a lack of clear benefit and a potential risk of bleeding with direct oral anticoagulant (DOAC) use in chronic kidney disease (CKD) and dialysis patients with atrial fibrillation. The objective of this study was to evaluate how treatment with DOACs affects stroke and bleeding outcomes compared with warfarin or aspirin. Methods: We conducted a systematic review of randomized controlled trials, cohort studies and case series, and searched electronic databases from 1946 to 2017...
March 2, 2018: Nephrology, Dialysis, Transplantation
Maja Hellfritzsch, Lotte Rasmussen, Jesper Hallas, Anton Pottegård
INTRODUCTION: Knowledge on adverse effects (AEs) related to non-vitamin K antagonist oral anticoagulants (NOACs) in real-world populations is sparse. OBJECTIVE: Our objective was to identify signals of potential AEs in patients with atrial fibrillation (AF) initiating NOAC treatment using a hypothesis-free screening approach. METHODS: Using the nationwide Danish registries, we identified patients with AF initiating dabigatran, rivaroxaban, or apixaban between 2011 and 2015 (n = 50,627)...
March 1, 2018: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
José Francisco Kerr Saraiva
Atrial fibrillation (AF) is an established risk factor for a first or recurrent stroke. Despite proven efficacy in preventing stroke in patients with AF, warfarin is underused, partly due to safety concerns. Recent randomized trials have shown that non-vitamin K antagonist oral anticoagulants (NOACs) such as dabigatran (a direct thrombin inhibitor) and apixaban, edoxaban, and rivaroxaban (factor Xa inhibitors) are not only non-inferior or superior to warfarin but also demonstrate a decreased risk of cerebrovascular bleeding among patients with AF and moderate to high risk of stroke...
February 27, 2018: Cardiology and Therapy
Carolin Hoyer, Alexandra Filipov, Eva Neumaier-Probst, Kristina Szabo, Anne Ebert, Angelika Alonso
BACKGROUND: Non-vitamin K antagonist oral anticoagulants (NOACs) have gained increasing importance for stroke prevention in patients with non-valvular atrial fibrillation (AF). With changing prescription practice, among other factors, clinicians can expect to see rising numbers of patients with ischemic stroke and pre-existing NOAC therapy. Few data exist regarding a potential impact of NOAC on stroke severity and outcome. AIMS: To evaluate the impact of pre-admission NOAC therapy on ischemic stroke severity...
February 23, 2018: Journal of Thrombosis and Thrombolysis
Olga Jelonek, Iwona Gorczyca, Michał Bączek, Paweł Kośmider, Beata Wożakowska-Kapłon
BACKGROUND: Prevention of thromboembolic complications is a priority in patients with atrial fibrillation (AF). The use of non-vitamin K antagonist oral anticoagulants (novel oral anticoagulants, NOAC) is more common, and some patients have indications for a reduced dose of NOAC. AIM: The aim of the study was to evaluate the frequency of NOACs being prescribed to AF patients and to compare the groups of AF patients receiving standard and reduced doses of NOACs. METHODS: The study was conducted in a population of 1,327 patients diagnosed with AF and hospitalized at an institution of the highest referral level in cardiology in years 2015-2016...
February 14, 2018: Kardiologia Polska
Oliver Königsbrügge, Günter Weigel, Peter Quehenberger, Ingrid Pabinger, Cihan Ay
The effect of direct oral anticoagulants (DOACs) on turbidimetric measurements of plasma clot formation and susceptibility to fibrinolysis may facilitate a comparison between different classes of anticoagulants in plasma samples. We obtained 424 citrate plasma samples from 226 atrial fibrillation patients on anticoagulation and 24 samples without anticoagulation serving as controls. As comparators, we measured the international normalized ratio (INR) for phenprocoumon samples (N = 166), anti-Xa for low molecular weight heparin (LMWH) samples (N = 42), and DOAC levels with mass spectrometry (dabigatran N = 40, rivaroxaban N = 110, apixaban N = 42)...
February 7, 2018: Clinical and Experimental Medicine
Shuk-Li Collings, Virginie Vannier-Moreau, Michelle E Johnson, Gillian Stynes, Cinira Lefèvre, Andrew Maguire, Joelle Asmar, Geoffray Bizouard, Didier Duhot, Frédéric Mouquet, Laurent Fauchier
BACKGROUND: Oral anticoagulants are prescribed in non-valvular atrial fibrillation for stroke prevention; however, little is known about the current management of anticoagulation in France, particularly given the availability of non-vitamin K antagonist oral anticoagulants in recent years. AIMS: To describe the characteristics of patients prescribed oral anticoagulants, and assess treatment persistence in French primary care. METHODS: We conducted a cohort study of patients with non-valvular atrial fibrillation, who were newly prescribed oral anticoagulants between 1 January 2014 and 31 January 2016, using French primary care data (IMS Longitudinal Patient Database)...
February 2, 2018: Archives of Cardiovascular Diseases
Judith J Stephenson, Mayura U Shinde, Winghan Jacqueline Kwong, An-Chen Fu, Hiangkiat Tan, William S Weintraub
Objective: To compare oral anticoagulant (OAC) adherence among patients with nonvalvular atrial fibrillation (NVAF) using patient-reported and claims-based measures, and to evaluate the effect of OAC adherence on health care costs and patient satisfaction with OAC therapy. Methods: This was a hybrid US observational study consisting of a longitudinal cohort survey followed by linkage and analysis of respondents' administrative claims data. Patients with NVAF receiving warfarin, dabigatran, rivaroxaban, or apixaban completed an initial survey and follow-up surveys at 4, 8, and 12 months...
2018: Patient Preference and Adherence
Ekta Yogeshkumar Pandya, Elizabeth Anderson, Clara Chow, Yishen Wang, Beata Bajorek
Background: To document antithrombotic utilization in patients with nonvalvular atrial fibrillation (NVAF), particularly, recently approved NOACs (nonvitamin K antagonist oral anticoagulants) and warfarin; and identify factors predicting the use of NOACs versus warfarin. Methods: A retrospective audit was conducted in an Australian hospital. Data pertaining to inpatients diagnosed with atrial fibrillation (AF) admitted between January and December 2014 were extracted...
February 2018: Therapeutic Advances in Drug Safety
Surbhi Shah, Faye L Norby, Yvonne H Datta, Pamela L Lutsey, Richard F MacLehose, Lin Y Chen, Alvaro Alonso
Randomized clinical trials comparing direct oral anticoagulants (DOACs) to warfarin in cancer patients have not been performed. We evaluated the effectiveness and associated risk of DOACs vs warfarin, as well as comparisons of DOACs, in a large population of cancer patients with nonvalvular atrial fibrillation (AF). Using the MarketScan databases, we identified 16 096 AF patients (mean age, 74 years) initiating oral anticoagulant and being actively treated for cancer between 2010 and 2014. Anticoagulant users were matched by age, sex, enrollment date, and drug initiation date...
February 13, 2018: Blood Advances
Alan Sugrue, Konstantinos C Siontis, Jonathan P Piccini, Peter A Noseworthy
Catheter ablation (CA) for atrial fibrillation (AF) is an established first-line approach to the management of drug-refractory AF. Although, advancements in procedural techniques and technology have improved the efficacy and safety of CA, thromboembolism (TE) remains one of the most feared periprocedural complications. Minimizing the risk of TE during and after CA requires a multifaceted approach, in which periprocedural anticoagulation plays a central role. The goal of anticoagulation before, during, and after CA is to minimize TE risk without excessively increasing the risk of adverse bleeding...
January 25, 2018: Current Treatment Options in Cardiovascular Medicine
Steve Deitelzweig, Xuemei Luo, Kiran Gupta, Jeffrey Trocio, Jack Mardekian, Tammy Curtice, Patrick Hlavacek, Melissa Lingohr-Smith, Brandy Menges, Jay Lin
In this study, all-cause, stroke/systemic embolism (SE)-related, and major bleeding (MB)-related health-care costs among elderly patients with nonvalvular atrial fibrillation (NVAF) initiating treatment with different oral anticoagulants (OACs) were compared. Patients ≥65 years of age initiating OACs, including apixaban, rivaroxaban, dabigatran, and warfarin, were identified from the Humana Research Database between January 1, 2013, and September 30, 2015. Propensity score matching was used to separately match the different OAC cohorts with the apixaban cohort...
January 1, 2018: Clinical and Applied Thrombosis/hemostasis
Abdulla Shehab, Akshaya Srikanth Bhagavathula, Tamrat Befakadu Abebe, Tadessa Melaku Abegaz, Asim Ahmed Elnour, Hani M Sabbour, Masood Uzzafer, Ahmad Hersi, Adel Khalifa Hamad
AIM: Real-world evidence from published observational studies of adherence to novel oral anticoagulants (NOACs) medications and associated clinical outcome events in atrial fibrillation (AF) patients, was reviewed systematically. METHODS: Observational studies assessing patient adherence to NOACs conducted on AF patients between September 2010 and June 2016 were identified by systematic searching keywords to locate eligible studies, in accordance with Cochrane guidelines...
January 22, 2018: Current Vascular Pharmacology
Stefan H Hohnloser, Edin Basic, Christopher Hohmann, Michael Nabauer
All pivotal trials have evaluated non-vitamin K oral antagonists (NOACs) against warfarin. However, in some regions of the world, phenprocoumon is the most widely used vitamin K antagonist (VKA). There is little evidence documenting effectiveness and safety of NOACs compared with phenprocoumon in atrial fibrillation (AF). A retrospective cohort study using a German claims database was conducted to assess effectiveness (stroke, systemic embolism [SE]) and safety (bleeding leading to hospitalization) during therapy with NOACs and phenprocoumon in 61,205 AF patients...
January 22, 2018: Thrombosis and Haemostasis
Gian Galeazzo Riario Sforza, Francesco Gentile, Fabio Stock, Francesco Caggiano, Enrica Chiocca, Cristoforo Incorvaia
The recent introduction of direct oral anticoagulants, including rivaroxaban, dabigatran, apixaban, and edoxaban, for the acute treatment and secondary prevention of venous thromboembolism and in atrial fibrillation has been shown to provide greater clinical benefit than oral vitamin K antagonists. However, direct oral anticoagulants are associated with adverse events, the most common being major bleeding; such events require the reversal of the anticoagulant effects by specific agents. In this case report, we describe an 87-year-old female with atrial fibrillation treated with dabigatran who had massive rectal bleeding...
2018: SAGE Open Medical Case Reports
Sean T Chen, Manesh R Patel
In patients with non-valvular atrial fibrillation (NVAF), oral anticoagulation is important for prevention of stroke and systemic embolism (SE). While Vitamin K antagonists (VKAs) have historically been the standard of care, these medications are limited by numerous food and drug interactions with onerous requirements for frequent monitoring and dose adjustments. Over the past decade, several novel oral anticoagulants (NOACs) have been developed to directly inhibit factor IIa/thrombin (dabigatran) or activated factor X (apixaban, rivaroxaban, edoxaban)...
January 13, 2018: Progress in Cardiovascular Diseases
J F Lock, J Wagner, V Luber, U A Dietz, S Lichthardt, N Matthes, K Krajinovic, C-T Germer, S Knop, A Wiegering
A growing number of patients in Germany receive a long-term prophylactic anticoagulation with phenprocoumone or one of the novel direct oral anticoagulants (NOAC), such as dabigatran, rivaroxaban or apixaban. The most common indication for an oral anticoagulant therapy is atrial fibrillation (approximately 75%) where the anticoagulant therapy can reduce the risk for an embolic event, particularly stroke by 60%. Operations carried out during such a therapy can result in major bleeding complications. On the other hand, suspending anticoagulant therapy can lead to an increased risk of thromboembolisms...
January 10, 2018: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
Viraj Suvarna
Stroke prevention in atrial fibrillation (AF) has reached an exciting phase with a plethora of newer, potentially more efficacious and safer agents being introduced for physicians to select from. Dabigatran belongs to a class of anticoagulants called direct thrombin inhibitors, while rivaroxaban, apixaban, and edoxaban are direct Factor Xa inhibitors. Purely from a therapeutic endpoint perspective-based on the action of anticoagulants in reducing cardioembolic stroke-in clinical trials, one should look at whether a new anticoagulant in patients with AF prevents ischemic stroke...
October 2017: Journal of the Association of Physicians of India
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