REPLACEMENT OF THE ENTIRE THORACIC AORTA IN A SINGLE-STAGE

Aneurysms of the entire thoracic aorta are usually approached in two to three stages. From 1990 to 1992, we performed one-stage aortic replacement from the root to the diaphragm in 12 patients (7 men, 5 women; median age, 51 years; range, 49 to 73 years). There were 9 type A dissections, 5 of which were acute. Five patients underwent aortic valve reconstruction, and 5 had aortic root replacement by Bentall or Cabrol techniques. In 2 patients the innominate artery had to be replaced by a vascular graft separately, in addition to reimplantation of the supraaortic branches as an island flap into the arch prosthesis. In 5 patients a mid-sternotomy was used; in 7 a bilateral transverse thoracotomy. The procedure was performed under deep hypothermic circulatory arrest in all cases (median, 45 minutes). Two patients, both operated on for an acute dissection, died perioperatively: 1 due to a bronchopneumonia, 1 because of a thrombosed Cabrol graft to the right coronary artery. No bleeding or neurologic complications developed. At a median follow-up of 14 months (range, 1 to 33 months), all patients discharged from the hospital were still alive, Four patients underwent subsequent thoracoabdominal aortic replacement. This experience suggests that complete thoracic aortic replacement can be performed in a single session, with an operative risk comparable with that of the conventional two-stage approach. The bilateral transverse thoracotomy affords an excellent exposure. The lack of spinal cord ischemia may be the result of spinal cord protection with hypothermic circulatory arrest and the open clamp technique.