Association of Thoracic Aortic Aneurysm Versus Aortic Dissection on Outcomes After Thoracic Endovascular Aortic Repair.

Background Because thoracic endovascular aortic repair (TEVAR) has become the standard of care for complicated type B aortic dissection (TBAD) and descending thoracic aortic (DTA) aneurysm, it is important to understand outcomes and use of TEVAR across thoracic aortic pathologies. Methods and Results This was an observational study of patients with TBAD or DTA undergoing TEVAR from 2010 to 2018, using the Nationwide Readmissions Database. In-hospital mortality, postoperative complications, admission costs, and 30- and 90-day readmissions were compared between the groups. Mixed model logistic regression was used to identify variables associated with mortality. An estimated total of 12 824 patients underwent TEVAR nationally, of which 6043 had an indication of TBAD and 6781 of DTA. Patients with aneurysms were more likely to be older, women, have cardiovascular disease, and have chronic pulmonary disease compared with patients with TBAD. Weighted in-hospital mortality was higher for TBAD (8% [1054/12 711] versus 3% [433/14 407],