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Updated: Apr 23, 2026

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
[Novel oral anticoagulants: more opportunities or more risks? And for which patients?]
Abstract:
Novel direct oral anticoagulants (NAO) represent an innovative and potentially relevant option for the prevention of cardiac embolism in patients with atrial fibrillation. Their recent introduction has been followed by a wide debate on their appropriate use, considering that they do not require regular monitoring of INR values as Vitamin K Antagonists (VKA) do, but that are much less tested in everyday clinical practice and much more expensive than VKA. Starting from the quite favourable results of the available RCTs - showing that NAO are at least non-inferior to VKA and that may be even better for some outcomes - this article discusses the clinical relevance of these results, their transferability into clinical practice looking at the methods of those RCTs and potential risks related to their widespread introduction. Final considerations on possible strategies for their appropriate and progressive introduction are also provided, using the experience developing in the Emilia-Romagna region.
Insights
Novel direct oral anticoagulants (NAO) offer a new option for preventing cardiac embolism in atrial fibrillation patients. While effective and convenient, their cost and limited real-world data require careful consideration for widespread adoption.
Area of Science:
- Cardiology
- Pharmacology
- Clinical Medicine
Context:
- Atrial fibrillation management
- Cardiac embolism prevention
- Anticoagulant therapy
Purpose:
- Evaluate novel direct oral anticoagulants (NAO) for atrial fibrillation
- Compare NAO with Vitamin K Antagonists (VKA)
- Discuss clinical relevance and implementation strategies
Summary:
- RCTs suggest NAO are non-inferior, potentially superior to VKA for certain outcomes in atrial fibrillation.
- NAO offer convenience by not requiring regular INR monitoring but are more expensive and less tested in practice than VKA.
- The article examines the transferability of RCT findings to clinical practice and potential risks of NAO introduction.
Impact:
- Inform clinical decision-making regarding anticoagulant choice in atrial fibrillation.
- Guide the progressive and appropriate introduction of NAO into clinical practice.
- Contribute to the evidence base for NAO use, considering cost-effectiveness and real-world application.
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