IJCS | Volume 31, Nº5, September / October 2018

472 Graph 1 - Aortic dissection according to technique. Group B Group A Aortic dissection p = 0.108 Oliveira et al. Mortality and survival in aortic arch surgeries Int J Cardiovasc Sci. 2018;31(5)466-482 Original Article Table 2 - Surgical data of patients who underwent partial preservation of aortic arch and supra-aortic vessels (Group A) and patients who underwent conventional surgical techniques for aortic arch reconstruction (Group B) Variable Group A (n = 29) Group B (n = 82) p N n(%), median (p25 - p75) or mean ± standard deviation N n(%), median (p25 - p75) or mean ± standard deviation Time of ECC (min) 26 169 ± 42 79 156 ± 59 0.311 Aortic cross-clamping time (min) 26 128 ± 44 79 116 ± 41 0.200 Hypothermia ( o C) 26 26 ± 4 79 27 ± 5 0.169 Drainage within the first 24 hours (mL) 27 468 (250 – 850) 72 375 (225 – 750) 0.469 Blood transfusion 25 89.3% 60 81.1% 0.321 Aortic valve repair 9 34.6% 20 27.0% 0.463 Descending aortic prosthesis 9 36.0% 16 21.9% 0.163 Coronary reimplantation 4 17.4% 20 27.8% 0.318 Combined surgery 17 58.6% 56 72.7% 0.162 Elective surgery 7 24.1% 37 45.7% 0.042 Urgent surgery 17 58.6% 36 44.4% 0.190 Emergent surgery 5 17.2% 8 9.9% 0.292 Intraoperative complications 7 24.1% 18 22.5% 0.857 ECC: extracorporeal circulation.