Geometry of left atrial appendage assessed with multidetector-row computed tomography: implications for transcatheter closure devices

Abstract

The feasibility of current devices is high, based on MDCT measurements of the LAA, with no difference for either one of the devices.

The Role of Multimodality Cardiac Imaging in the Management of Patients with Atrial Fibrillation

“…The ostial perimeter of the LAA measured by cardiac CT is the most reproducible parameter for sizing an LAA occluder, rather than the measurement of LAA maximum diameter [68,69]. The use of CT imaging is also not limited to preprocedural planning; it could also be used to assess device position, complete occlusion of the LAA, and device-related complications such as thrombosis and para-device leak (Fig.…”

Left atrial appendage: anatomy and imaging landmarks pertinent to percutaneous transcatheter occlusion

“…Accurate measurement of the LAA ostial diameters and circumference is critically important for successful device ostial closure; 2D TOE significantly underestimates LAA dimension and orifice size as compared with 3D TOE15 (figure 11). Some groups use only intracardiac echocardiography, or even angiographic control, to guide the procedure.…”

Novel integrated 3D multidetector computed tomography and fluoroscopy fusion for left atrial appendage occlusion procedures

“…To achieve effective LAA occlusion, operators rely on multiple imaging modalities to ensure procedural success and avoidance of complications, and as such, there are a number of specific imaging challenges associated with the procedure [3]. Understanding the benefits and limitations of the principal imaging modalities for each step of the procedure is of key importance, as the LAA and its surrounding structures demonstrate wide variability in their morphology and 3‐dimensional relationships, with inaccuracies in measurement or device sizing potentially resulting in device mal‐apposition, peri‐device leaks , or damage to surrounding structures .…”