Abstract
Aneurysm of the thoracic aorta is a serious form of disease because it may be extensive or associated with a more distant aneurysm. This manifestation occurs in about one-third of the cases. The actuarial 5-year survival of nontreated patients is only 13% with many patients dying from aortic rupture. The 5-year survival of our patients with aneurysm of the descending thoracic aorta treated by graft replacement is 58% with the two most common causes of late death being myocardial infarction and rupture of another aortic aneurysm. Effective treatment consists of initial total aortic examination, continued follow-up examination, and total replacement of disease. Aneurysmal disease that involves the entire aortic arch is especially prone to extensive involvement because it is due to diffuse aortic dissection or medial degenerative disease in most cases. The latter is most common, being present in 63 of our 81 patients requiring total arch replacement. The disease was extensive in all cases with degenerative medial disease and required extensive graft replacement. In fact, the entire thoracic aorta was involved in ten, the entire thoracic aorta and substantial segments of abdominal aorta in ten, and the entire aorta in 12 patients. Most of these patients were women (84%) over 65 years of age (63%) or older, ten (37%) were over 70 years. Associated pulmonary disease was frequent, aortic valvular insufficiency was present in 12 (38%), and symptoms were present in most. Treatment consisted of removing the disease when possible in stages, the arch in one and the remaining disease in another with the sequence and interval depending upon indications and condition of the patient. A total of 53 operations were performed in these 32 patients, the arch replaced in 29, the descending thoracic aorta in eight, and the thoracoabdominal aortic segment in 16 patients. All of the disease was replaced in 21, including the entire aorta in eight and incompletely replaced in 11 patients. Sixteen (76%) of the former are still alive 4 months to 6 1/3 years. Six (55%) of those in whom operation was limited to replacement of the symptomatic aortic segment because of limited risk are still alive. Of the ten deaths occurring during the study period, four (40%) and perhaps five (50%) were due to natural rupture of unresected disease which indicates its progressive nature and suggests the need for aggressive surgical treatment.
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