Operative outcomes after open repair of descending thoracic aortic aneurysms in the era of endovascular surgery.

BACKGROUND

Since the advent of endovascular techniques for repair of descending thoracic aortic aneurysms (DTAAs), there has been a relative paucity of current data for open repairs. The purpose of this study was to assess the operative and long-term outcomes in a contemporary series of open repairs of DTAAs.

METHODS

We conducted a retrospective review of 68 patients (63±14.5 years) who underwent DTAA repairs between January 1999 and December 2010. Forty-two patients (62%) were male, 16 (24%) had chronic obstructive pulmonary disease, 7 (10%) required dialysis preoperatively, 11 (16%) had contained rupture, 25 (37%) had previous cardioaortic operations, and 10 (15%) had previous aortic arch replacement (stage 1 elephant trunk). The entire descending thoracic aorta was replaced in 34 patients (50%). Cardiopulmonary bypass was used in 64 patients (94%) and deep hypothermic arrest in 22 (32%).

RESULTS

In-hospital mortality was 3% (2 patients). There was no immediate paraplegia. Delayed paraplegia developed in 1 patient (1.5%). Postoperative stroke occurred in 3 patients (4.4%), and 20 (29%) required prolonged ventilatory support (intubation≥48 hours). New-onset renal insufficiency (creatinine≥2.5 mg/dL) developed postoperatively in 6 patients (9%), and 1 (1.5%) required temporary dialysis. The median follow-up time was 5.8±3.8 years. Sixteen of the 66 operative survivors (24.2%) died during follow-up. Probability of survival was 82%±0.05% at 5 years and 67%±0.07% at 10 years. Reintervention was necessary in 4 patients (6%). Freedom from reintervention was 98%±0.02% at 5 years and 89%±0.06% at 10 years. The univariable predictor of long-term death was postoperative reintubation (p<0.05).

CONCLUSIONS

In the era of endovascular repair of DTAAs, operative death and morbidity outcomes for open repairs are observed to be low. In addition to good long-term survival rates, open repairs are durable, as evidenced by low reintervention rates.