Fig. 4

Left atrial appendage (LAA) visualization by two-dimensional transesophageal echocardiography shows the sequel of blood stasis. A Severe spontaneous echo contrast (small white arrows). B X-plane view of LAA shows dense spontaneous echo contrast associated with sludge formation (yellow arrow). C Small rounded LAA thrombus (white arrow). D Large LAA thrombus protruding into the LA (white arrows) associated with sludge (yellow arrow)