IJCS | Volume 31, Nº5, September / October 2018

473 Oliveira et al. Mortality and survival in aortic arch surgeries Int J Cardiovasc Sci. 2018;31(5)466-482 Original Article Thirty-day mortality and in-hospital mortality was found in 24.1% (7 patients) and 31% (9 patients), respectively, in group A and in 26.8% (22 patients) and 29.3% (24 patients) in group B, with no statistically significant differences between the groups (Table 3). Overall survival was 1,178.27 days (mean) and 843.00 days (median). In group A, mean survival was 1,182.83 days and in group B, 1,176.66 (OR = 268.114 days – 95% CI [-527.705-515.367]). Regarding all-cause mortality, a two-year survival rate of 59.3% and 59% were observed in groups A and B, respectively, and a 5-year survival rate of 45.5% and 35.8% were observed in groups A and B, respectively, with no statistically significant difference between the groups (Graph 2). Survival curve was also analyzed by the causes of death registered in death certificates and classified into cardiovascular and non-cardiovascular death. GroupA showed a thirty-day cardiovascular mortality of 10.3%, an in-hospital cardiovascular mortality of 13.8%, and a 2-year and 5-year mortality for cardiovascular diseases of 14.8% and 22.7%, respectively. In group B, Table 3 - Overall mortality by techniques for aortic arch reconstruction (partial preservation of aortic arch and supra- aortic vessels, Group A or conventional surgeries, Group B) Outcome Group A Group B p N n(%) N n(%) 30-day mortality 7 24.1% 22 26.8% 0.777 In-hospital mortality 9 31.0% 24 29.3% 0.858 1 year- mortality 10 34.5% 28 34.1% 0.974 2-year mortality 11 40.7% 32 41.0% 0.979 5-year mortality 12 54.4% 34 64.2% 0.437 Graph 2 - Overall survival curve in patients who underwent partial preservation of aortic arch and supra-aortic vessels (Group A, n = 29) and patients who underwent conventional surgical techniques for aortic arch reconstruction (Group B, n = 82). Group A Group B Survival Time Log rank - p = 0.989