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The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
Update on antithrombotic therapy for stroke prevention in atrial fibrillation
Hermelinda G Abcede1, Bruce Ovbiagele
1Department of Neurology, University of California, Los Angeles, 710 Westwood Plaza, Suite 1-240, Los Angeles, CA 90095 USA.
Insights
Atrial fibrillation (AF) increases stroke risk in older adults. Combination antiplatelet therapy shows promise as an alternative to warfarin for stroke prevention in high-risk AF patients.
Area of Science:
- Cardiology
- Neurology
- Pharmacology
Background:
- Atrial fibrillation (AF) is a common cardiac arrhythmia in the elderly, significantly increasing stroke risk.
- Strokes associated with AF are often severe and fatal, necessitating effective preventative strategies.
- Warfarin is a recognized effective treatment for stroke prevention in high-risk AF patients, but concerns limit its use.
Purpose of the Study:
- To review the efficacy of combination antiplatelet regimens for stroke prevention in patients with nonvalvular AF.
- To compare combination antiplatelet therapy with other antithrombotic strategies, including warfarin, single antiplatelet therapy, and newer agents.
Main Methods:
- Review of two recent clinical trials investigating combination antiplatelet regimens in high-risk nonvalvular AF patients.
- Discussion of existing literature on oral anticoagulation, single antiplatelet therapies, and novel anticoagulants (direct thrombin inhibitors, factor Xa inhibitors).
Main Results:
- Combination antiplatelet regimens were investigated as an alternative to warfarin for stroke prevention.
- The article evaluates the potential of these regimens to match or exceed warfarin's efficacy with a more favorable side effect profile.
Conclusions:
- Combination antiplatelet therapy is explored as a viable option for stroke prevention in specific AF patient populations.
- Further research and clinical trials are essential to establish the role of novel antithrombotic therapies in managing AF-related stroke risk.
Abstract:
Atrial fibrillation (AF) is the most common cardiac arrhythmia in the elderly, affecting 1 in 20 adults over the age of 70 years. Stroke is a major yet highly preventable complication of AF, and the strokes related to AF often are disabling and fatal. Warfarin is the treatment of choice in high-risk patients with AF, and its superior efficacy over aspirin for preventing stroke in these patients is widely recognized. However, several eligible patients with AF are not being treated with warfarin or are being treated inadequately, largely because of concerns regarding the attendant strict monitoring, drug interactions, and risk of major bleeding. As such, alternative antithrombotic therapies that can rival or exceed the efficacy of warfarin, yet compare favorably with its administration and side effect profile, are being sought. One such strategy, the use of a combination antiplatelet regimen, for stroke prevention in high-risk patients with nonvalvular AF was investigated recently in two clinical trials. This article reviews the role of combination antiplatelet regimens in stroke prevention for patients with AF. Other therapies discussed include oral anticoagulation, single antiplatelet therapies, oral anticoagulation plus antiplatelet treatment, direct thrombin inhibitors, and factor Xa inhibitors.
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