PMC5791505_01
Mass in the left atrium appendage
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F1
TEE examination an echo dense, round mass was identified in the center of left atrial appendage (LAA) in midesophageal four-chamber view at an angle of 36  [Figure 1 and Video 1].
Left atrial appendage bridging mass with its attachments to left atrial appendage walls
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F2
During this examination, the mass was visualized with its attachment to both the walls of LAA [Figures 2 and 3], and it was identified as hypertrophied pectinate muscle bridging across the LAA cavity.
Elongated mass with definite connection with left atrial appendage wall on both sides across the cavity of left atrial appendage
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F3
During this examination, the mass was visualized with its attachment to both the walls of LAA [Figures 2 and 3], and it was identified as hypertrophied pectinate muscle bridging across the LAA cavity.