Aortic Reintervention
The cumulative incidence of the need for aortic reintervention with death as a competing outcome is shown in Figure 4 . Fourteen patients underwent aortic reintervention (4 hemiarch, 10 total arch). The median time to aortic reintervention was 505 days (IQR 152 – 505) days in the hemiarch group and 437.4 days (IQR 84 – 437.5) in the total arch group. Of the hemiarch reintervention, 2 required a descending thoracic endograft, 1 aortic valve replacement, and 1 re-replacement of the ascending aorta. Of the aortic reintervention in the total arch group, 7 required a descending thoracic endograft, 2 of which included aortic arch endografts, 2 open aortic arch repairs, and 1 aortic root replacement. The cumulative incidence of aortic reintervention with death as a competing outcome was 2.6, 2.6, and 4.4% at 1, 2, and 3 years in the hemiarch group and 5.0, 10.3, and 11.9% in the total arch group. The total arch group was 3.19 times more likely to require aortic reintervention (sub-hazard ratio (SHR) 3.10, 95% CI 1.00 – 10.1, p=0.049) in a univariable competing risk model (death as competing outcome). After adjustment for age, the presence of a total arch repair remained significantly associated with need for aortic reintervention (SHR 3.21, 95% CI 1.01 – 10.2, p=0.047). Age was not associated with the need for aortic reintervention (SHR 0.90, 95% CI 0.65 – 1.23, p=0.50).