Meta-Analysis Comparing Watchman^TM and Amplatzer Devices for Stroke Prevention in Atrial Fibrillation

Area of Science:

• Cardiology
• Medical Devices
• Interventional Cardiology

Background:

• Left atrial appendage (LAA) closure is an alternative for atrial fibrillation patients at high risk for bleeding or unable to use oral anticoagulation.
• This study compares the efficacy and safety of Amplatzer and Watchman LAA closure devices.

Approach:

• A meta-analysis of six studies involving 614 patients was conducted.
• Study quality was assessed using the Newcastle-Ottawa Scale.
• Safety and efficacy outcomes were compared between the Amplatzer and Watchman devices.

Key Points:

• Both LAA closure devices demonstrated low overall event rates.
• No significant differences were observed in safety outcomes (e.g., pericardial effusion, tamponade, embolization) or mortality/stroke rates.
• The Watchman group showed a significantly lower total bleeding rate but similar major/minor bleeding rates compared to Amplatzer.
• The Watchman group had significantly higher total and insignificant peridevice leakage rates, though significant leakages were comparable.

Conclusions:

• Amplatzer and Watchman LAA closure devices exhibit comparable efficacy and safety profiles.
• A key difference noted was a higher incidence of insignificant peridevice leakages with the Watchman device.
• Further insights are anticipated from an ongoing randomized controlled trial comparing these devices.