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Different Risk Profiles of European Patients Using Direct Oral Anticoagulants or Vitamin K Antagonists: a Rapid Review
AbstractPurpose of ReviewWe investigated the risk profiles of patients using direct oral anticoagulants (DOAC) or vitamin K antagonists (VKA) in European cohort studies to estimate the importance of potential (measured or unmeasured) confounding factors in analyses comparing these drugs. We searched MEDLINE and EMBASE (2008 –2018) for relevant studies and extracted information on age, sex, comorbidity, Charlson comorbidity index, HAS-BLED score (assessing risk of bleeding) and CHA2DS2-VASc score (assessing risk of stroke).Recent FindingsOverall, 66 studies with 2,808,757 patients were included. Most patients were from Fr...
Source: Current Epidemiology Reports - November 14, 2020 Category: Epidemiology Source Type: research

Using the Case-Crossover Design to Assess Short-Term Risks of Bleeding and Arterial Thromboembolism After Switching Between Oral Anticoagulants in a Population-Based Cohort of Patients With Atrial Fibrillation
AbstractUsing nationwide Danish registries, we conducted a population-based case-crossover study evaluating the association between switching from a vitamin K antagonist (VKA) to a direct oral anticoagulant (DOAC), and vice versa, and 30-day risks of bleeding and arterial thromboembolism in patients with atrial fibrillation (AF). The case-crossover population was identified among oral anticoagulant users during 2011 –2018 (n = 123,217) as patients with AF with 1) a case-defining outcome and 2) an anticoagulant switch during the 180 days preceding the outcome. Odds ratios were estimated using conditional logistic regres...
Source: American Journal of Epidemiology - July 8, 2020 Category: Epidemiology Source Type: research

Using the Case-crossover Design to Assess Short-term Risks of Bleeding and Arterial Thromboembolism Following Switching Between Oral Anticoagulants in a Population-based Cohort of Atrial Fibrillation Patients.
Abstract Using nationwide Danish registries, we conducted a population-based case-crossover study evaluating the association between switching from a vitamin K antagonist (VKA) to a direct oral anticoagulant (DOAC), and vice-versa, and 30-day risks of bleeding and arterial thromboembolism in atrial fibrillation (AF) patients. The case-crossover population was identified among oral anticoagulant users during 2011-2018 (n = 123,217), as AF patients with (a) a case-defining outcome and (b) an anticoagulant switch during the 180 days preceding the outcome. Odds Ratios were estimated using conditional logistic regres...
Source: Am J Epidemiol - July 7, 2020 Category: Epidemiology Authors: Hellfritzsch M, Wang SV, Grove EL, Gagne JJ, Hallas J, Pottegård A Tags: Am J Epidemiol Source Type: research

Preventable Cases of Oral Anticoagulant-Induced Bleeding: Data From the Spontaneous Reporting System
Conclusion: Our findings describe the most reported risk factors for preventability of oral anticoagulant-induced bleedings. These factors may be useful for targeting interventions to improve pharmacovigilance activities in our regional territory and to reduce the burden of medication errors and inappropriate prescription. Introduction Oral anticoagulant therapy is widely used for the prevention of stroke and systemic embolism in patients with atrial fibrillation, or for the prevention and treatment of deep vein thrombosis and pulmonary embolism (Raj et al., 1994; Monaco et al., 2017). Oral anticoagulants can be di...
Source: Frontiers in Pharmacology - April 29, 2019 Category: Drugs & Pharmacology Source Type: research

Effect of Variation in Published Stroke Rates on the Net Clinical Benefit of Anticoagulation for Atrial Fibrillation.
Conclusion: Variation in published AF stroke rates for patients not receiving anticoagulant therapy results in multifold variation in the net clinical benefit of anticoagulation. Guidelines should better reflect the uncertainty in current thresholds of stroke risk score for recommending anticoagulation. Primary Funding Source: None. PMID: 30264130 [PubMed - as supplied by publisher]
Source: Annals of Internal Medicine - September 25, 2018 Category: Internal Medicine Authors: Shah SJ, Eckman MH, Aspberg S, Go AS, Singer DE Tags: Ann Intern Med Source Type: research

Resumption of oral anticoagulation following traumatic injury and risk of stroke and bleeding in patients with atrial fibrillation: a nationwide cohort study
ConclusionAF patients resuming VKA and NOAC treatment following traumatic injury have lower hazard of all-cause mortality and ischaemic stroke, increased hazard of major bleeding but without additional hazards of recurrent traumatic injury. Withholding OAC following a traumatic injury in AF patients may not be warranted.
Source: European Heart Journal - November 18, 2017 Category: Cardiology Source Type: research

Predicted risk of stroke and bleeding and use of oral anticoagulants in atrial fibrillation: Danish nationwide temporal trends 2011 –2016
We used Danish nationwide registries to examine temporal trends in the predicted stroke and bleeding risks (mean CHA2DS2-VASc and HAS-BLED scores per year, respectively) as well as the combination of selected stroke and bleeding risk factors per year among atrial fibrillation (AF) patients initiated for the first time between 2011 and 2016 on vitamin K antagonists (VKAs), dabigatran, rivaroxaban, or apixaban.
Source: Thrombosis Research - October 16, 2017 Category: Hematology Authors: Alexandar Dukanovic, Laila Staerk, Emil Loldrup Fosb øl, Kasper Gadsbøll, Gunnar Hilmar Gislason, Jonas Bjerring Olesen Tags: Full Length Article Source Type: research

Standard and reduced doses of dabigatran, rivaroxaban and apixaban for stroke prevention in atrial fibrillation: a nationwide cohort study
ConclusionsStandard and reduced dose NOACs, respectively, showed no significant risk difference for associated stroke/thromboembolism. Rivaroxaban was associated with higher bleeding risk compared with dabigatran and apixaban and dabigatran was associated with lower intracranial bleeding risk compared with rivaroxaban and apixaban.
Source: Journal of Internal Medicine - September 21, 2017 Category: Internal Medicine Authors: L. Staerk, T. A. Gerds, G. Y. H. Lip, B. Ozenne, A. N. Bonde, M. Lamberts, E. L. Fosb øl, C. Torp‐Pedersen, G. H. Gislason, J. B. Olesen Tags: Original Article Source Type: research

Important factors affecting the choice of an oral anticoagulant may be missed in database studies
This article is protected by copyright. All rights reserved.
Source: Journal of Internal Medicine - September 7, 2017 Category: Internal Medicine Authors: Emma Aarnio, Risto Huupponen, Maarit Jaana Korhonen Tags: Letter to the Editor Source Type: research

Standard and reduced doses of dabigatran, rivaroxaban, and apixaban for stroke prevention in atrial fibrillation: a nationwide cohort study
ConclusionsStandard and reduced dose NOACs, respectively, showed no significant risk difference for associated stroke/thromboembolism. Rivaroxaban was associated with higher bleeding risk compared with dabigatran and apixaban, and dabigatran was associated with lower intracranial bleeding risk compared with rivaroxaban and apixaban.This article is protected by copyright. All rights reserved.
Source: Journal of Internal Medicine - September 1, 2017 Category: Internal Medicine Authors: Laila Staerk, Thomas A Gerds, Gregory Y H Lip, Brice Ozenne, Anders N Bonde, Morten Lamberts, Emil L Fosb øl, Christian Torp‐Pedersen, Gunnar H Gislason, Jonas B Olesen Tags: Original Article Source Type: research

Shifting to a non-vitamin K antagonist oral anticoagulation agent from vitamin K antagonist in atrial fibrillation
ConclusionIn a contemporary setting among VKA-experienced NVAF patients; VKA is still prevalent although about 30% by December 2015 had shifted to a NOAC.
Source: Europace - June 28, 2017 Category: Cardiology Source Type: research

Non-vitamin K antagonist oral anticoagulation agents in anticoagulant naive atrial fibrillation patients: Danish nationwide descriptive data 2011-2013
Conclusion Among oral anticoagulation-naïve AF patients initiated on oral anticoagulation in Denmark, warfarin initiation has declined since the introduction of dabigatran in August 2011. Dabigatran is the most frequently used alternative option to warfarin; however, use of rivaroxaban and apixaban is increasing. Patients initiated with rivaroxaban or apixaban in general have a higher predicted stroke and bleeding risks compared with warfarin or dabigatran initiators.
Source: Europace - January 29, 2015 Category: Cardiology Authors: Olesen, J. B., Sorensen, R., Hansen, M. L., Lamberts, M., Weeke, P., Mikkelsen, A. P., Kober, L., Gislason, G. H., Torp-Pedersen, C., Fosbol, E. L. Tags: Atrial fibrillation Source Type: research