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Updated: Mar 20, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
[New orally anticoagulants and brain stroke]
Beata Kaczorowska1, Małgorzata Pawełczyk1, Monika Przybyła2
1Department of Neurology and Brain Stroke, Medical University of Lodz, Poland.
Insights
New oral anticoagulants (NOA) offer a safer alternative to warfarin for preventing strokes in atrial fibrillation (AF) patients, reducing bleeding risks. Further research is needed on long-term safety and cost-effectiveness.
Area of Science:
- Neurology
- Cardiology
- Pharmacology
Context:
- Atrial fibrillation (AF) is a primary cause of ischemic stroke, necessitating effective anticoagulant therapy.
- Traditional anticoagulants like warfarin have limitations, prompting the search for safer alternatives.
- Risk stratification for anticoagulation in AF patients relies on CHA2DS2-VASc and HAS-BLED scores.
Purpose:
- To evaluate the efficacy and safety of new oral anticoagulants (NOA) in preventing stroke and systemic embolism in AF patients.
- To compare the bleeding risk profile of NOA with vitamin K antagonists (VKA).
- To identify current gaps in knowledge regarding NOA, including long-term safety and economic viability.
Summary:
- NOA demonstrate comparable or superior efficacy to VKAs in preventing stroke and systemic embolism in AF patients.
- NOA are associated with a significantly lower risk of bleeding, particularly intracranial hemorrhage, compared to VKAs.
- Clinical studies show promising results for NOA, but long-term safety data and cost-effectiveness analyses are still evolving.
Impact:
- NOA represent a significant advancement in stroke prevention for AF patients, offering improved safety profiles.
- The adoption of NOA may reduce the burden of stroke and associated healthcare costs.
- Further research into long-term outcomes and economic factors will guide optimal clinical implementation of NOA.
Abstract:
Brain stroke is a grave society problem. About 20% ischemic strokes are cardiac related problems. Atrial fibrillation (AF) is the most common cause of ischemic strokes. Decision to deploy anticoagulant treatment with AF patient depends on bleeding and thrombo-embolic risk which summerise scale CHA(2)DS(2)VASc and HAS-BLED. Past recent years in AF treatment anticoagulants from the group of vitamin K antagonist were used. At present in brain stroke prevention and systemic emboilment, new oral anticoagulants (NOA) which weren't worst than vitamin K antagonists, and they are recomendet in most cases of AF unrelated with heart valve defets. Useing NOA causes lower risk of bleeding, including intracranial heamorrhage. It is believed that this is related to the selective inhibition of specific coagulation factors, and respect other hemostatic mechanisms. Results from clinical studies NOA are encouraging, but still lacks clear answers regarding, among other things: long-term safety of treatment and economically viable in everyday clinical practice. In addition, to date there is no specific antidote for this group of drugs.
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