(tt2624) M, 59 y. Mechanical AV prosthesis (Carbomedics #25) (Fig 1-2). Vascular graft in ascending aorta (Fig. 5). Linear artifact in the LA cavity (Fig 3-4; white short arrow in Fig. 4), replicating the anterior wall of the vascular graft: the distance between the transducer and the artifact doubles approximately the distance between the transducer and the anterior aortic wall (53 mm).