Abstract
•Computed tomography (CT) has a central role in both the preprocedure planning and the postprocedure monitoring of complications associated with left atrial appendage occlusion (LAAO) devices.•Ultra-high resolution photon-counting CT (PCCT) is showing superiority in the assessment of structural heart disease across various devices.•The paper demonstrates the use of PCCT in identifying postprocedural complications associated with the deployment of LAAO devices, specifically, peri-device leaks.