IJCS | Volume 31, Nº5, September / October 2018

471 Oliveira et al. Mortality and survival in aortic arch surgeries Int J Cardiovasc Sci. 2018;31(5)466-482 Original Article Table 1 - Preoperative clinical characteristics 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 Age 29 63 ± 13 82 64 ± 15 0.889 Sex Female 10 34.5% 28 34.1% 0.974 Male 19 65.5% 54 65.9% 0.974 HAS 25 86.2% 72 90.0% 0.576 Blood pressure at admission (mmHg) Systolic 23 133 ± 32 67 126 ± 21 0.245 Diastolic 21 72 ± 20 67 70 ± 14 0.245 Diabetes mellitus 10 41.7% 23 37.7% 0.036 Obesity 4 14.3% 15 19.7% 0.523 BMI (kg/m 2 ) 27 26.27 ± 3.38 77 26.85 ± 4.34 0.533 Ischemic stroke 3 10.7% 3 4.8% 0.301 Highest creatinine level (mg/dL) 22 0.95 (0.80 – 1.30) 74 1.10 (0.9 – 1.30) 0.934 CRF 2 7.7% 8 10.8% 0.648 COPD 1 3.7% 8 11.0% 0.260 PAD 1 3.6% 3 4.1% 0.911 Arrhythmia 2 7.4% 8 11.9% 0.519 AMI 3 10.3% 8 10.7% 0.962 CRF: chronic renal failure; COPD: chronic obstructive pulmonary disease; PAD: Peripheral arterial disease; AMI: acute myocardial infarction. The frequencies of combined surgeries were 58.6% in group A and 72.7% in group B. In addition, in group A, 24.1% of patients underwent elective surgery, 58.6% urgent surgery and 17.2% emergent surgery, whereas in group B these frequencies were 45.7%, 44.4% and 9.9%, respectively. Intraoperative complications – blood dyscrasia, hypotension secondary to the use of amine, etc. – occurred in 24.1% of patients in group A and no deaths were reported. In group B, intraoperative complications occurred in 22.5%of patients, with death in 1.3% (Table 2). The most frequent postoperative complications were – blood transfusion (48.3%), drainage volume within the first 24 hours of surgery greater than 600 mL (41.4%), mechanical ventilation time longer than 24 hours (37.9%) and acute renal failure (32.1%). In group B, complications were – arrhythmia (34.2%), mechanical ventilation time longer than 24 hours (33.8%) and blood transfusion (32.5%) (Table 2). One hemorrhagic event was reported in each group confirmed by clinical and imaging data obtained from the medical records. Reoperated patients were found only in 2 patients in group B (2.43%), during different hospital admissions. Also, 60.7% and 43.0% of patients in groups A and B, respectively had aortic dissection (Graph 1).