Antithrombotic therapy after left atrial appendage closure

Area of Science:

• Cardiology
• Interventional Cardiology
• Thrombosis Research

Background:

• Left atrial appendage closure is an alternative to anticoagulation for stroke prevention.
• Preventing thrombus formation on the device is critical post-procedure.
• Most patients undergoing closure have contraindications to oral anticoagulation due to bleeding history.

Purpose of the Study:

• To review antithrombotic strategies for left atrial appendage closure.
• To address the challenges in selecting optimal antithrombotic therapy in real-world patients.
• To highlight the need for further research on antithrombotic duration and novel agents.

Main Methods:

• Review of clinical studies and real-world data on antithrombotic therapy post-left atrial appendage closure.
• Analysis of dual antiplatelet therapy strategies in patients with contraindications to oral anticoagulation.
• Discussion of current knowledge gaps and future research directions.

Main Results:

• Dual antiplatelet therapy is a viable option for patients ineligible for oral anticoagulation.
• The optimal duration of antithrombotic therapy remains undetermined.
• Further investigation is needed for direct oral anticoagulants and long-term aspirin use.

Conclusions:

• Antithrombotic therapy selection after left atrial appendage closure is complex, particularly in high-risk patients.
• Evidence supports dual antiplatelet therapy as an alternative, but optimal duration is unknown.
• Future research should focus on direct oral anticoagulants and the necessity of long-term aspirin therapy.