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Warfarin Use and Risk of Stroke in Patients With Atrial Fibrillation Undergoing Hemodialysis: A Meta-Analysis
Abstract: In spite of the substantial burden of atrial fibrillation and associated elevated ischemic stroke risk in patients undergoing hemodialysis, the role of warfarin in these high-risk patients remains uncertain. Our objective was to clarify the association between warfarin use and risk of stroke for patients with atrial fibrillation undergoing dialysis. PubMed and Embase from January 1966 to January 2015 were searched to identify relevant studies. Inclusion criteria were cohort studies, patients with atrial fibrillation undergoing hemodialysis, and reported quantitative estimates of the multivariate adjusted relativ...
Source: Medicine - February 1, 2016 Category: Internal Medicine Tags: Research Article: Meta-Analysis of Observ Studies in Epidemiology Source Type: research

Effectiveness and Safety of Warfarin in Dialysis Patients With Atrial Fibrillation: A Meta-Analysis of Observational Studies
The objective of this study was to assess the effectiveness and safety of warfarin use in patients with AF undergoing dialysis. Three databases PubMed, EMBASE, and OVID were searched from their inception to August 2015. Observational studies which assessed the ischemic stroke or bleeding risk of warfarin use in dialysis patients with AF were included. Two reviewers independently extracted data and assessed methodological quality based on the Newcastle–Ottawa Scale score. Combined hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated using the random-effects model and heterogeneity was assessed based...
Source: Medicine - December 1, 2015 Category: Internal Medicine Tags: Research Article: Meta-Analysis of Observational Studies in Epidemiology Source Type: research

Use of non‐vitamin K antagonist oral anticoagulants in atrial fibrillation patients: insights from a specialist atrial fibrillation clinic
ConclusionIn this specialist AF clinic, patients prescribed NOACs had a favourable adverse event profile with good efficacy for stroke prevention, with a low rate of cessation or switch to warfarin.
Source: International Journal of Clinical Practice - August 3, 2015 Category: Internal Medicine Authors: S. I. Lee, M. Sayers, G. Y. H. Lip, D. A. Lane Tags: Original Paper Source Type: research

Feasibility and safety of uninterrupted dabigatran therapy in patients undergoing ablation for atrial fibrillation.
Conclusion Uninterrupted dabigatran therapy in CA for AF thus may be a safe and effective anticoagulant therapy, and appears to be closely similar to continuous warfarin; however, it is essential to pay close attention to the APTT values when using dabigatran during CA. PMID: 25986252 [PubMed - in process]
Source: Internal Medicine - June 3, 2015 Category: Internal Medicine Tags: Intern Med Source Type: research

Using the Watchman device to close the left atrial appendage reduces risk of stroke in atrial fibrillation, compared to using warfarin
Commentary to: Reddy VY, Sievert H, Halperin J, et al.; PROTECT AF Steering Committee and Investigators. Percutaneous left atrial appendage closure vs warfarin for atrial fibrillation: a randomized clinical trial. JAMA 2014;312:1988–98 . Context Atrial fibrillation (AF) is a common arrhythmia in clinical practice. The major complication of AF is thromboembolic stroke. Patients with AF have a fivefold higher risk of stroke and a twofold increase in mortality.1 As complete cure for AF is never certain, the aims of AF therapy are symptom relief and prevention of thromboembolic events. The latter can be managed by vitami...
Source: Evidence-Based Medicine - May 22, 2015 Category: Internal Medicine Authors: Swaans, M. J., Alipour, A., Boersma, L. V. Tags: Clinical trials (epidemiology), Epidemiologic studies, Drugs: cardiovascular system, Stroke, Arrhythmias Therapeutics/Prevention Source Type: research

Vitamin K antagonist-experienced patients with a history of stroke/transient ischaemic attack who switched from warfarin to dabigatran increased their rate of recurrent stroke/transient ischaemic attack compared with those on warfarin
Commentary on: Larsen TB, Rasmussen LH, Gorst-Rasmussen A, et al. Dabigatran and warfarin for secondary prevention of stroke in atrial fibrillation patients: a nationwide cohort study. Am J Med 2014;127:1172–8 . Context Randomised trials have shown that patients with atrial fibrillation (AF) who are treated with a non-vitamin K antagonist oral anticoagulant (NOAC), compared with warfarin, have similar or lower rates of stroke and major bleeding, markedly reduced rates of intracranial bleeding and a consistent pattern of reduced mortality.1 Dabigatran 150 mg two times a day is the only NOAC that can significantly...
Source: Evidence-Based Medicine - May 22, 2015 Category: Internal Medicine Authors: Eikelboom, J. W., Bosch, J. Tags: Epidemiologic studies, Time-to-event methods, Drugs: cardiovascular system, Stroke, Arrhythmias Aetiology/Harm Source Type: research

Anticoagulant Prescription in Patients With AF
In patients with atrial fibrillation (AF) who are at risk for thromboembolism, anticoagulation therapy with warfarin or the newer novel anticoagulants reduces morbidity and mortality. Because oral anticoagulant use carries a risk of bleeding, the drugs are not recommended in patients with AF who are at a particularly low risk for stroke. Specifically, previous AF guidelines recommend against the use of oral anticoagulation in patients younger than 60 years without heart disease or other known risk factors for thromboembolism, and more recently updated guidelines do not recommend the use of oral anticoagulation in patients ...
Source: JAMA Internal Medicine - April 13, 2015 Category: Internal Medicine Source Type: research

Stroke prevention with rivaroxaban in higher‐risk populations with atrial fibrillation
ConclusionsThese subgroup analyses demonstrate that the treatment effect for rivaroxaban vs. warfarin is broadly consistent across a wide range of patient groups, with respect to both efficacy and safety.
Source: International Journal of Clinical Practice - April 9, 2015 Category: Internal Medicine Authors: H.‐C. Diener, J. L. Halperin, K. Fox, G. J. Hankey Tags: Review Article Source Type: research

Efficacy and Safety of Oral Anticoagulants Versus Aspirin for Patients With Atrial Fibrillation: A Meta-Analysis
Abstract: The purpose of this study was to perform a meta-analysis comparing the effectiveness and safety of anticoagulation to antiplatelet therapy for the prevention of thromboembolic events in patients with atrial fibrillation (AF). MEDLINE, Cochrane, EMBASE, and Google Scholar databases were searched for studies published through May 31, 2014. Randomized controlled trials comparing anticoagulants (warfarin) and antiplatelet therapy in patients with AF were included. The primary outcomes were the rates of stroke and systemic embolism. Secondary outcomes included the rates of hemorrhage/major bleeding and death. Pooled o...
Source: Medicine - January 1, 2015 Category: Internal Medicine Tags: Article: Systematic Review and Meta-Analysis Source Type: research

Literature Update in Hospital Medicine
Publication date: April 2014 Source:Hospital Medicine Clinics, Volume 3, Issue 2 Author(s): William Southern , Bradley A. Sharpe , Romsai Tony BoonyasaiTeaser Perioperative statins reduce perioperative myocardial infarctions, atrial fibrillation, and length of stay. Statins do not increase the risk of intracranial hemorrhage. New oral anticoagulants are superior to warfarin in preventing stroke in patients with atrial fibrillation, and may have a better safety profile. In patients who have an acute gastrointestinal bleed while on warfarin, restarting warfarin after a week may lead to fewer thromboses and lower mortality ...
Source: Hospital Medicine Clinics - October 12, 2014 Category: Internal Medicine Source Type: research

Evidence suggests dabigatran is an effective and safe treatment for patients with VTE requiring early parenteral therapy
Commentary on: Schulman S, Kakkar AK, Goldhaber SZ, et al.. Treatment of acute venous thromboembolism with dabigatran or warfarin and pooled analysis. Circulation 2014;129:764–72. Context Until recently, an initial course of parenteral anticoagulation followed by vitamin K antagonist (VKA) was the standard of care for the treatment of venous thromboembolism (VTE). In the past few years, direct oral anticoagulants (DOAC) have been found to be non-inferior to VKA.1–3 The RE-COVER study found dabigatran to be non-inferior to warfarin, with a reduced risk for clinically relevant bleeding.4 In order to confirm these...
Source: Evidence-Based Medicine - September 15, 2014 Category: Internal Medicine Authors: Granziera, S., Cohen, A. T. Tags: Drugs: cardiovascular system, Stroke, Venous thromboembolism, Radiology, Pulmonary embolism, Clinical diagnostic tests Therapeutics Source Type: research

Controversies regarding the new oral anticoagulants for stroke prevention in patients with atrial fibrillation
This article raises 10 controversial issues regarding the use of NOACs for stroke prevention in patients with atrial fibrillation, and offers a review of the latest available evidence. We provide a brief overview of the mechanism and dosing of these drugs, as well as a summary of the key clinical trials that have brought them into the spotlight. Comparative considerations relative to warfarin such as NOAC safety, efficacy, bleeding risk, reversibility, drug-transitioning and use in patients well controlled on warfarin are addressed. Use in select populations such as the elderly, those with coronary disease, renal impairmen...
Source: Vascular Medicine recent issues - May 30, 2014 Category: Internal Medicine Authors: Mohanty, B. D., Looser, P. M., Gokanapudy, L. R., Handa, R., Mohanty, S., Choi, S. S., Goldman, M. E., Fuster, V., Halperin, J. L. Tags: Review Articles Source Type: research

Left atrial appendage occlusion with the Watchman device in a patient with paroxysmal atrial fibrillation and intolerance of all forms of anticoagulation due to hereditary haemorrhagic telangiectasia
Abstract An elderly woman presented to our attention because of paroxysmal atrial fibrillation and cerebrovascular events requiring systemic anticoagulation and a concomitant, serious bleeding diathesis (the Osler‐Weber‐Rendu syndrome, or hereditary haemorrhagic telangiectasia). Her risk of suffering a major stroke was significant given a CHA2DS2VASc score of 6. However, she was unable to tolerate any form of anticoagulation because of torrential epistaxis and previous gastrointestinal haemorrhage on antiplatelet therapy. We proceeded with percutaneous occlusion of the left atrial appendage with a Watchman device. Ten ...
Source: Internal Medicine Journal - March 13, 2014 Category: Internal Medicine Authors: R. Spina, B. Gunalingam Tags: Brief Communication Source Type: research

Dabigatran increased bleeding and stroke compared with warfarin after mechanical heart valve implantation.
PMID: 24343411 [PubMed - in process]
Source: Annals of Internal Medicine - December 17, 2013 Category: Internal Medicine Authors: Kolias TJ Tags: Ann Intern Med Source Type: research

Clinical outcomes with rivaroxaban in patients transitioned from vitamin k antagonist therapy: a subgroup analysis of a randomized trial.
CONCLUSION: The efficacy of rivaroxaban in VKA-experienced and VKA-naive patients was similar to that of the overall trial. There were more bleeding events within 7 days of study drug initiation with rivaroxaban, but after 30 days, rivaroxaban was associated with less bleeding in VKA-naive patients and similar bleeding in VKA-experienced patients. This information may be useful to clinicians considering a transition to rivaroxaban for patients receiving VKA therapy. PRIMARY FUNDING SOURCE: Johnson & Johnson and Bayer HealthCare. PMID: 23778903 [PubMed - in process]
Source: Annals of Internal Medicine - June 18, 2013 Category: Internal Medicine Authors: Mahaffey KW, Wojdyla D, Hankey GJ, White HD, Nessel CC, Piccini JP, Patel MR, Berkowitz SD, Becker RC, Halperin JL, Singer DE, Califf RM, Fox KA, Breithardt G, Hacke W Tags: Ann Intern Med Source Type: research

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