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Updated: Aug 21, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
[Cardiac indications for oral anticoagulation]
1Herz-Kreislauf-Zentrum, Kardiologie, Universitätsspital, Departement Innere Medizin, Zürich. marco.roffi@usz.ch
Insights
Long-term oral anticoagulation requires balancing benefits against bleeding risks. New anticoagulants may offer fixed-dose, monitoring-free alternatives to warfarin for preventing thromboembolic events.
Area of Science:
- Cardiology
- Pharmacology
- Thrombosis Research
Context:
- Oral anticoagulation is crucial for managing thromboembolic events.
- Warfarin has been the long-standing standard treatment.
- Emerging oral anticoagulants show promise for improved patient management.
Purpose:
- To review the benefits and risks of long-term oral anticoagulation.
- To discuss current indications and controversial uses of anticoagulation.
- To highlight advancements in anticoagulant therapies.
Summary:
- Balancing the reduction of thromboembolic events against bleeding risks is essential for individual patients on long-term oral anticoagulation.
- Established indications include chronic atrial fibrillation, prosthetic heart valves, and left ventricular thrombus.
- The efficacy of anticoagulation in stable sinus rhythm with impaired left ventricular function and secondary coronary artery disease prevention remains debated.
- Novel oral thrombin inhibitors like ximelagatran demonstrate promising results.
- Future anticoagulants may offer fixed-dose administration without the need for monitoring, potentially replacing warfarin.
- Clinical trials are evaluating double antiplatelet therapy (aspirin and clopidogrel) for secondary prevention in atrial fibrillation.
Impact:
- Informs clinical decision-making regarding oral anticoagulation therapy.
- Highlights the potential shift towards more convenient and effective anticoagulant treatments.
- Guides future research in anticoagulant and antiplatelet therapies for cardiovascular disease.
Abstract:
While considering long-term oral anticoagulation one should assess benefit (i.e., reduction in thromboembolic events) and risks (i.e., bleeding complications) associated with therapy for each individual patient. The classic cardiac indications for oral anticoagulation include chronic atrial fibrillation, prosthetic heart valves, and left ventricular thrombus formation following anterior myocardial infarction. The value of anticoagulation in patients with impaired left ventricular function in stable sinus rhythm and in secondary prevention of coronary artery disease remains controversial. For decades warfarin has been the only compound available. Currently, promising results have been achieved with the oral thrombin inhibitor ximelagatran. In the future, oral anticoagulants, which are administered in fixed dose with no need for monitoring of the anticoagulation level, may replace warfarin. Safety and efficacy of double antiplatelet therapy (aspirin and clopidogrel) in the secondary prevention of thromboembolic events in patients with atrial fibrillation are currently being addressed in large-scale clinical trials.
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