Preprocedural and Postprocedural CT Imaging Can Identify Patients at Risk for Complications After LAA Occlusion.

Area of Science:

• Cardiology
• Medical Imaging
• Interventional Procedures

Background:

• Left atrial appendage occlusion (LAAO) offers an alternative to anticoagulation for atrial fibrillation patients.
• Predicting successful LAAO device implantation using preplanning imaging, like cardiac computed tomography (CCT), remains challenging.

Purpose of the Study:

• To identify preprocedural and postprocedural CCT measurements associated with successful LAAO implantation.
• To determine if CCT measurements can predict early postimplant complications.

Main Methods:

• Retrospective study of 165 patients undergoing LAAO with Watchman FLX.
• Analysis of preimplant and postimplant CCT scans.
• Follow-up for adverse events (peri-device leak, device-related thrombus, cerebrovascular events) within 90 days.

Main Results:

• Adverse events occurred in 24.2% of patients.
• Higher left atrial pressure, larger LAA ostium diameters (max and min), and smaller postimplant area change were associated with adverse events.
• Significant P-values indicate statistical relevance for these findings.

Conclusions:

• Smaller LAA ostial dimensions and greater device compression on CCT correlate with fewer post-LAAO complications.
• Favorable preimplant LAA ostial morphology appears oval-shaped and smaller.
• These CCT-derived characteristics may predict better postimplant outcomes.