Acute aortic dissection. Personal experience.

: Aortic dissection is a catastrophic event with a high mortality rate for untreated patients. One hundred and thirteen patients with acute aortic dissection were observed in the IInd Surgical Department of Milan University from 1974 to 1985; 55 had type I and II aortic dissection and 58 had type III aortic dissection. All patients with type I and II and about 50% of patients with type III aortic dissection underwent surgical correction. In the second type III group the aortic lesion was surgically corrected only when visceral ischaemia or ischaemia of the lower limb was recognized. In the other type III cases, medical treatment was preferred. The mortality rate was lower after medical treatment (15%) than after surgical treatment (37%). Follow-up was performed for the majority of patients and was recently completed with non-invasive techniques like Magnetic Resonance. It accurately shows the residual dissection and follows, the development of occlusion of the false lumen without any risk to the patients.