Figure 1
From: Clinical and echocardiographic features of aorto-atrial fistulas

Off axis 2-D short axis TEE view demonstrates the left atrium (LA) the prosthetic aortic valve (AV). An echolucent area (EL) around the aortic valve protruding into LA is seen with focal outpouching into the LA. This represents weakening of the wall of the aorta near the posterior aspect of the LA