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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
Published on: February 26, 2013
Meta-analysis of postoperative antithrombotic therapy after left atrial appendage occlusion
Shu-Yue Li1,2, Juan Wang3, Xiang Hui1,2
1Department of Pharmacy, Nanjing Drum Tower Hospital Affiliated to Nanjing University Medical School, Jiangsu Nanjing, China.
Insights
Anticoagulant therapy is safer and more effective than antiplatelet therapy after left atrial appendage occlusion (LAAO). New oral anticoagulants (NOACs) show promise as alternatives to vitamin K antagonists (VKAs).
Area of Science:
- Cardiology
- Interventional Cardiology
- Pharmacology
Background:
- Left atrial appendage occlusion (LAAO) is an alternative to anticoagulation for stroke prevention in atrial fibrillation.
- Optimal antithrombotic therapy post-LAAO remains under investigation.
- Device-related thrombus (DRT) and thromboembolic events are key concerns after LAAO.
Purpose of the Study:
- To compare the safety and effectiveness of various anticoagulant and antiplatelet regimens following LAAO.
- To analyze the incidence of adverse events associated with different antithrombotic strategies post-LAAO.
Main Methods:
- A comprehensive meta-analysis of studies identified through major biomedical databases (PubMed, MEDLINE, EMBASE, Web of Science, Cochrane Library).
- Inclusion criteria focused on studies evaluating antithrombotic regimens after LAAO.
- Analysis of outcomes including DRT, stroke, systemic thromboembolism, bleeding, cardiovascular mortality, and all-cause mortality.
Main Results:
- The meta-analysis included 32 studies with 4,474 patients.
- Subgroup analysis revealed significant differences in DRT, cardiovascular mortality, and all-cause mortality rates among antithrombotic strategies.
- Single antiplatelet therapy showed the highest adverse event rates, followed by dual antiplatelet therapy (DAPT). Vitamin K antagonists (VKAs) and new oral anticoagulants (NOACs) demonstrated lower adverse event rates.
Conclusions:
- Anticoagulant therapy is superior to antiplatelet therapy in terms of safety and efficacy post-LAAO.
- Anticoagulant therapy, particularly NOACs, should be preferred over DAPT in patients without contraindications.
- NOACs represent a promising alternative to VKAs for antithrombotic management after LAAO.
Objective:
This meta-analysis explored the safety and effectiveness of different anticoagulant regimens after left atrial appendage occlusion (LAAO).
Methods:
Databases, such as PubMed, MEDLINE, EMBASE, Web of Science, and Cochrane Library, were searched to identify eligible studies according to the inclusion criteria. The incidences of events, including device-related thrombus (DRT) formation, stroke, systemic thromboembolism, bleeding, cardiovascular mortality, and all-cause mortality, were analyzed using R version 3.2.3.
Results:
The screening retrieved 32 studies, including 36 study groups and 4,474 patients. The incidence of outcomes after LAAO was calculated via meta-analysis. In the subgroup analysis, the rates of DRT formation, cardiovascular mortality, and all-cause mortality were significantly different among different antithrombotic methods. Single antiplatelet therapy was associated with the highest rate of adverse events, followed by dual antiplatelet therapy (DAPT). Vitamin K antagonists (VKAs) and new oral anticoagulants (NOACs) carried lower rates of adverse events.
Conclusions:
Anticoagulant therapy had better safety and efficacy than antiplatelet therapy. Thus, for patients with nonabsolute anticoagulant contraindications, anticoagulant therapy rather than DAPT should be actively selected. NOACs displayed potential for further development, and these treatments might represent alternatives to VKAs in the future.
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