The authors report the case of subadventitial rupture of the isthmus o
f the aorta due to trauma, diagnosed by transoesophageal echocardiogra
phy. The role of transoesophageal echocardiography compared with conve
ntional diagnostic techniques is discussed. This method of investigati
on is a very good diagnostic tool in cases of closed trauma of the tho
rax.