PMC8084375_01
A. Appendage aneurysm showed by transthoracic echocardiography; B. Blood velocity of left atrial appendage; C. Three-dimensional echocardiography showed pectinate muscles (marked by a white arrow) inside the left atrial appendage; D. Global longitudinal strain of the left ventricle wall; E. Three-dimensional computed tomography showed the overall view of the heart; LA : left atrium; LAAA : left atrial appendage aneurysm.
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Furthermore, there was a giant left atrial appendage aneurysm (LAAA), 62 x 31 mm in size, compressing the left ventricular wall (Fig. 1A). Doppler imaging showed that blood communicated between the left atrium and LAAA (Fig. 1A), with slightly impaired left atrial appendage function (Fig. 1B). Three-dimensional echocardiography showed distinct pectinate muscles (Fig. 1C, white arrow) and no thrombus in the LAAA (Fig. 1C). Based on speckle tracking imaging, left ventricular global longitudinal strain was -14.8%, and the bull's eye showed paradoxical movement of compressed basal and mid segments of the anterior, anterolateral, and inferolateral walls (Fig. 1D). Three-dimensional computed tomography reconstruction delineated the appearance of the LAAA (Fig. 1E).