Intraoperative transesophageal echocardiographic view prior to replacement of the aortic valve prosthesis. This midesophageal aortic valve long axis view during systole demonstrates a normal-appearing St. Jude aortic prosthesis during diastole (arrow). In particular, no thrombus, pannus, or mechanical obstruction is identified. The left atrium (LA) and left ventricle (LV) are also identified.