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Reduction of strokes from atrial fibrillation

David J Graham, Marsha E Reichman, Michael Wernecke, Ya-Hui Hsueh, Rima Izem, Mary Ross Southworth, Yuqin Wei, Jiemin Liao, Margie R Goulding, Katrina Mott, Yoganand Chillarige, Thomas E MaCurdy, Chris Worrall, Jeffrey A Kelman
Importance: Dabigatran and rivaroxaban are non-vitamin K oral anticoagulants approved for stroke prevention in patients with nonvalvular atrial fibrillation (AF). There are no randomized head-to-head comparisons of these drugs for stroke, bleeding, or mortality outcomes. Objective: To compare risks of thromboembolic stroke, intracranial hemorrhage (ICH), major extracranial bleeding including major gastrointestinal bleeding, and mortality in patients with nonvalvular AF who initiated dabigatran or rivaroxaban treatment for stroke prevention...
October 3, 2016: JAMA Internal Medicine
Angelique H Sadlon, Dimitrios A Tsakiris
BACKGROUND: Concerns regarding the use of direct oral anticoagulants (DOACs: apixaban, dabigatran, edoxaban, rivaroxaban) in the elderly persist owing to the lack of randomised controlled trials targeting this age group. OBJECTIVES: The aim of this study was to assess the efficacy and safety of DOACs in elderly patients (aged 75 years or more) with atrial fibrillation or venous thromboembolism (VTE), based on already published large randomised trials. METHODS: EMBASE, MEDLINE and the Cochrane Library were searched from inception to June 2015 for phase III trials...
2016: Swiss Medical Weekly
Nijole Bernaitis, Chi Keong Ching, Liping Chen, Jin Shing Hon, Siew Chong Teo, Andrew K Davey, Shailendra Anoopkumar-Dukie
BACKGROUND: Warfarin reduces stroke risk in atrial fibrillation (AF) patients but requires ongoing monitoring. Time in therapeutic range (TTR) is used as a measure of warfarin control, with a TTR less than 60% associated with adverse patient outcomes. The Sex, Age, Medical history, Treatment, Tobacco use, Race (SAMe-TT2R2) score has been identified as a model able to predict warfarin control, but this has been tested in mainly Caucasian populations. Therefore, the aim of this study was to determine the ability of the SAMe-TT2R2 score to predict warfarin control in a Singaporean population consisting of Chinese, Malay, and Indian race...
September 23, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
Timothy R Betts, Milena Leo, Sandeep Panikker, Prapa Kanagaratnam, Michael Koa-Wing, David Wyn Davies, David Hildick-Smith, Dylan G Wynne, Oliver Ormerod, Oliver R Segal, Anthony W Chow, Derick Todd, Sandra Cabrera Gomez, Graeme J Kirkwood, David Fox, Chris Pepper, John Foran, Tom Wong
OBJECTIVES: This study aimed at assessing the feasibility and long-term efficacy of left atrial appendage occlusion (LAAO) in a "real world" setting. BACKGROUND: Although LAAO has recently emerged as an alternative to oral anticoagulants in patients with atrial fibrillation for the prevention of thromboembolic stroke, "real world" data about the procedure with different devices are lacking. METHODS: Eight centers in the United Kingdom contributed to a retrospective registry for LAAO procedures undertaken between July 2009 and November 2014...
September 21, 2016: Catheterization and Cardiovascular Interventions
Craig I Coleman, Matthias Antz, Kevin Bowrin, Thomas Evers, Edgar P Simard, Hendrik Bonnemeier, Riccardo Cappato
BACKGROUND: Little data exists regarding the effectiveness and safety of rivaroxaban or apixaban versus warfarin in nonvalvular atrial fibrillation (NVAF) patients treated outside of clinical trials. METHODS: This was a retrospective study using MarketScan claims from January 2012 to October 2014. We included adults, newly initiated on rivaroxaban, apixaban or warfarin, with a baseline CHA2DS2-VASc score ≥2, ≥2 diagnosis codes for NVAF and ≥180 days of continuous medical and prescription benefits...
September 20, 2016: Current Medical Research and Opinion
Eduard Shantsila, Gregory Yh Lip
BACKGROUND: Morbidity in patients with chronic heart failure is high, and this predisposes them to thrombotic complications, including stroke and thromboembolism, which in turn contribute to high mortality. Oral anticoagulants (e.g. warfarin) and antiplatelet agents (e.g. aspirin) are the principle oral antithrombotic agents. Many heart failure patients with sinus rhythm take aspirin because coronary artery disease is the leading cause of heart failure. Oral anticoagulants have become a standard in the management of heart failure with atrial fibrillation...
September 15, 2016: Cochrane Database of Systematic Reviews
Marco Alings
Non-vitamin K antagonist (VKA) oral anticoagulants (NOACs) have emerged as alternatives to VKAs for the prevention of stroke in patients with non-valvular atrial fibrillation. Four NOACS: dabigatran, apixaban, rivaroxaban and edoxaban, have received regulatory approval in Europe from the European Medicines Agency. Numerous factors can influence the decision to prescribe a NOAC, the most important of which are assessment of stroke and bleeding risks. Given the variation in design of the pivotal phase III clinical trials investigating the efficacy and safety of NOACs, and in the absence of head-to-head comparative data, it is impossible to recommend one NOAC over the other...
August 2016: Arrhythmia & Electrophysiology Review
Kang-Ling Wang, Robert Giugliano, Shinya Goto, Chun-Chih Chiu, Chun-Yi Lin, En-Yu Lai, Chern-En Chiang
BACKGROUND: Although randomized controlled trials (RCTs) indicated that standard dose non-vitamin K antagonist oral anticoagulants (NOACs) were more compelling, low-dose NOACs are commonly used in clinical practice in Asia. OBJECTIVE: The purpose of this study was to assess the relative therapeutic benefits and risks of standard vs low-dose NOACs in Asian patients enrolled in contemporary RCTs. METHODS: We performed a prespecified meta-analysis of 3155 Asian patients with NOACs in the RE-LY (Randomized Evaluation of Long-Term Anticoagulation Therapy) and ENGAGE AF-TIMI 48 (Effective Anticoagulation with Factor Xa Next Generation in Atrial Fibrillation-Thrombolysis in Myocardial Infarction 48) trials...
September 8, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Michael D Ezekowitz, Charles V Pollack, Paul Sanders, Jonathan L Halperin, Judith Spahr, Nilo Cater, William Petkun, Andrei Breazna, Paulus Kirchhof, Jonas Oldgren
BACKGROUND: Stroke prevention in anticoagulation-naïve patients with atrial fibrillation undergoing cardioversion has not been systematically studied. OBJECTIVE: To determine outcomes in anticoagulation-naïve patients (defined as those receiving an anticoagulant for <48 hours during the index episode of atrial fibrillation) scheduled for cardioversion. METHODS: This is a randomized, prospective, open-label, real-world study comparing apixaban to heparin plus warfarin...
September 2016: American Heart Journal
Jérémie Abtan, Deepak L Bhatt, Yedid Elbez, Emmanuel Sorbets, Kim Eagle, Yasuo Ikeda, David Wu, Mary E Hanson, Hakima Hannachi, Puneet K Singhal, Philippe Gabriel Steg, Gregory Ducrocq
BACKGROUND: Although the rate of in-hospital ischemic events after myocardial infarction (MI) has dramatically decreased, long-term residual risk may remain substantial. However, most of the information on current residual risk is derived from highly selected randomized trials. HYPOTHESIS: In patients with previous MI and no prior ischemic stroke/transient ischemic attack (TIA), residual ischemic risk increases over time. METHODS: Using the international Reduction of Atherothrombosis for Continued Health (REACH) registry, we analyzed baseline characteristics and 4-year follow-up of patients with previous MI and no history of stroke/TIA to describe annual rates of recurrent ischemic events globally and by geography...
September 2, 2016: Clinical Cardiology
Abeer Anabtawi, John M Miles
OBJECTIVE: Metformin is the most commonly prescribed drug for the treatment of type 2 diabetes because of its apparent robust effects in reducing cardiovascular risk. This review examines the current literature regarding the nonglycemic effects and potential novel indications for metformin. METHODS: Review of the literature, with a focus on metformin use in Stage 3 chronic kidney disease (CKD-3) and heart failure (HF). RESULTS: The United Kingdom Prospective Diabetes Study suggests that metformin reduces the risk of myocardial infarction, and more recent retrospective studies have shown an association between metformin use and a reduction in stroke, atrial fibrillation and all-cause mortality...
August 2016: Endocrine Practice
Daniel A Steinhaus, Peter J Zimetbaum, Rod S Passman, Peter Leong-Sit, Matthew R Reynolds
INTRODUCTION: Anticoagulation guidelines for patients with atrial fibrillation (AF) disregard AF burden. A strategy of targeted anticoagulation with novel oral anticoagulants (NOACs) based on continuous rhythm assessment with an implantable cardiac monitor (ICM) has recently been explored. We evaluated the potential cost-effectiveness of this strategy versus projected outcomes with continuous anticoagulation. METHODS AND RESULTS: We developed a Markov model using data from the Rhythm Evaluation for AntiCoagulaTion With COntinuous Monitoring (REACT...
August 30, 2016: Journal of Cardiovascular Electrophysiology
Martin J O'Donnell, John W Eikelboom, Salim Yusuf, Hans-Christoph Diener, Robert G Hart, Eric E Smith, David J Gladstone, Mukul Sharma, Rafael Dias, Greg Flaker, Alvaro Avezum, Jun Zhu, Gayle Lewis, Stuart Connolly
BACKGROUND: Clinical and subclinical (covert) stroke is a cause of cognitive loss and functional impairment. In the AVERROES trial, we performed serial brain magnetic resonance imaging (MRI) scans in a subgroup to explore the effect of apixaban, compared with aspirin, on clinical and covert brain infarction and on microbleeds in patients with atrial fibrillation. METHODS: We performed brain MRI (T1, T2, fluid-attenuated inversion recovery, and T2* gradient echo sequences) in 1,180 at baseline and in 931 participants at follow-up...
August 2016: American Heart Journal
John H Alexander, Ulrika Andersson, Renato D Lopes, Ziad Hijazi, Stefan H Hohnloser, Justin A Ezekowitz, Sigrun Halvorsen, Michael Hanna, Patrick Commerford, Witold Ruzyllo, Kurt Huber, Sana M Al-Khatib, Christopher B Granger, Lars Wallentin
IMPORTANCE: In the Apixaban for Reduction of Stroke and Other Thromboembolic Complications in Atrial Fibrillation (ARISTOTLE) trial, the standard dose of apixaban was 5 mg twice daily; patients with at least 2 dose-reduction criteria-80 years or older, weight 60 kg or less, and creatinine level 1.5 mg/dL or higher-received a reduced dose of apixaban of 2.5 mg twice daily. Little is known about patients with 1 dose-reduction criterion who received the 5 mg twice daily dose of apixaban...
September 1, 2016: JAMA Cardiology
J David Spence
Elevated levels of total homocysteine impair endothelial dysfunction and increase thrombosis. Homocysteine is causal in animal models, and in human studies, elevated total homocysteine is significantly associated with carotid atherosclerosis, lacunar infarction, and markedly increased risk of stroke in atrial fibrillation. Because two of the early large trials of B vitamin therapy (Vitamin Intervention for Stroke Prevention and the Norwegian Vitamin Study) did not show any reduction of stroke, and the Heart Outcomes Prevention Evaluation 2 trial was mistakenly interpreted as not showing a reduction of stroke (because the authors could not think of a biological difference between stroke and myocardial infarction), there has been widespread pessimism regarding treatment to lower total homocysteine for stroke prevention...
October 2016: International Journal of Stroke: Official Journal of the International Stroke Society
Thomas Wilke, Sabine Bauer, Sabrina Mueller, Thomas Kohlmann, Rupert Bauersachs
OBJECTIVES: Since the introduction of non-vitamin K antagonist (VKA) oral anticoagulants (NOACs), an additional treatment option, apart from VKAs, has become available for stroke prevention in patients with atrial fibrillation (AF). For various reasons, it is important to consider patients' preferences regarding type of medication, particularly in view of the established relationship between preferences towards treatment, associated burden of treatment, and treatment adherence. This review aimed to systematically analyse the scientific literature assessing the preferences of AF patients with regard to long-term oral anticoagulant (OAC) treatment...
July 26, 2016: Patient
Laurent Fauchier, Coralie Lecoq, Yann Ancedy, Karim Stamboul, Christophe Saint Etienne, Fabrice Ivanes, Denis Angoulvant, Dominique Babuty, Yves Cottin, Gregory Y H Lip
Management of antithrombotic therapy in patients with atrial fibrillation (AF) and coronary stenting remains challenging, and there is a need for efficient tools to predict their risk of different types of cardiovascular events and death. Several scores exist such as the CHA2DS2-VASc score, the Global Registry of Acute Coronary Events (GRACE) score, the Synergy between Percutaneous Coronary Intervention with Taxus and Cardiac Surgery (SYNTAX) score, the Anatomical and Clinical Syntax II Score and the Reduction of Atherothrombosis for Continued Health score...
September 1, 2016: American Journal of Cardiology
Yong-Won Kim, Dong-Hun Kang, Yang-Ha Hwang, Jaechan Park, Yong-Sun Kim
OBJECTIVE: Mechanical thrombectomy (MT) for acute intracranial internal carotid artery (ICA) occlusion is often complicated by difficult revascularization and non-involved territory embolization possibly related with larger clot-burden. This study aims to evaluate the efficacy of proximal aspiration thrombectomy (PAT) using a balloon-tipped guide catheter for clot-burden reduction in such cases with period-to-period analysis (period 1 : standard MT without PAT; period 2 : PAT first, then standard MT for the remaining occlusion)...
July 2016: Journal of Korean Neurosurgical Society
Ziad Hijazi, Stefan H Hohnloser, Ulrika Andersson, John H Alexander, Michael Hanna, Matyas Keltai, Alexander Parkhomenko, José L López-Sendón, Renato D Lopes, Agneta Siegbahn, Christopher B Granger, Lars Wallentin
IMPORTANCE: Renal impairment confers an increased risk of stroke, bleeding, and death in patients with atrial fibrillation. Little is known about the efficacy and safety of apixaban in relation to renal function changes over time. OBJECTIVES: To evaluate changes of renal function over time and their interactions with outcomes during a median of 1.8 years of follow-up in patients with atrial fibrillation randomized to apixaban vs warfarin treatment. DESIGN, SETTING, AND PARTICIPANTS: The prospective, randomized, double-blind Apixaban for Reduction in Stroke and Other Thromboembolic Events in Atrial Fibrillation (ARISTOTLE) clinical trial randomized 18 201 patients with atrial fibrillation to apixaban or warfarin...
July 1, 2016: JAMA Cardiology
Esteban Orenes-Piñero, Mariano Valdés, Gregory Y H Lip, Francisco Marín
Atrial fibrillation (AF) is the most common arrhythmia in clinical practice and is associated with decreased quality of life, and increased mortality and morbidity from stroke and thromboembolism. The underlying mechanisms involved in the development of AF have yet to be fully elucidated. However, once initiated, AF tends to self-perpetuate, due to structural and electrical remodeling in the atria. Currently, therapies for AF, such as, antiarrhythmic drugs and catheter ablation, have significant limitations...
August 2015: Drug Metabolism Reviews
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