[Value of echocardiography in the diagnosis of dissecting aneurysm of the aorta].

A revision of 1300 echocardiograms of adults showed 14 patients whose echocardiographic diagnosis of aortic root dissecting aneurism (D.A.). Of these, 8 didn't have any anamnestic, clinical or instrumental evidence of D.A. In the other 6, admitted to our department with a suspected D.A., echocardiography proved to be useful in confirming such diagnosis in 4, in excluding it in 1, but gave a false positive diagnosis of D.A. in the sixth, affected by a diffuse carcinomatosis with pleuropericardial blood effusion. From the examination of the present experience, the Authors deem echocardiography is a useful diagnostic tool in the screening of D.A. when the following conditions are fulfilled: 1) presence of all the major criteria of Nanda and Gramiak, especially the aortic root anterior wall dilatation beyond 16 mm; 2) an almost suggestive story and clinical evidence of D.A. The usefulness of an echocardiographic pattern recently described as diagnostic of D.A. (loss of continuity between the borders of the anterior aortic wall with interventricular septum, and/or posterior aortic wall with mitral anulus) was confirmed: it was detected in 3 of the 4 D.A. patients but in none of the others. The presence of a false positive and the possibility of technical artifacts nevertheless induce caution in the interpretation of the echocardiographic pattern alone.