Schaffer et al. analysed 11,996 thoracic endovascular aortic repair (TEVAR) cases between 2005-2010 identified through Medicare/Medicaid databases.
Overall, patients had a median survival of 57.6 months following TEVAR. Significant differences in survival were identified when compared between etiologies. The authors also found 6-12% of patients who survived beyond 6 months died each year following surgery. Finally, hospital volume was not interestingly not found to be associated with survival; rather, the effect of high-performing hospital.
The study is available at http://www.ncbi.nlm.nih.gov/pubmed/25541408.