The 3D TEE is a powerful imaging tool that now is the standard of care in the evaluation of heart valve disease, in guiding the percutaneous catheter-based procedures and in learning functional anatomy. 3DTEE provides incremental information over 2DTEE in patients with aortic aneurysm and dissection type A ¹. In literature there are few data about the contribute of the third dimension in the transesophageal echocardiography (TEE) in type B aortic dissections and there are described during thoracic endovascular aortic repair ^2;3.