[Detection of aneurysms of the atrial septum using transesophageal echocardiography].

In 7/340 patients (2.1%) examined by transesophageal echocardiography, aneurysms of the intraatrial septum were observed. In no patient were additional shunts present. In 3/7 patients mitral valve and in 2/7 patients tricuspidal valve prolapse was found. Intraatrial septum aneurysms seem to have a higher frequency than that indicated by transthoracical echocardiography. The incidence observed by transesophageal echocardiography corresponds to the incidence of pathological findings.