Characteristic Total
(n = 261) Total Arch
(n = 112) Hemiarch
(n = 149) p value
Characteristic Total (n = 261) Total Arch (n = 112) Hemiarch (n = 149) p value Reoperative sternotomy 81 (31.0) 40 (35.7) 41 (27.5) 0.157 Emergent/urgent operation 205 (78.5) 76 (67.9) 129 (86.6) <0.0001 Proximal aortic repair 0.304 Isolated ascending 90 (34.5) 44 (39.3) 46 (30.9) Aortic valve replacement 96 (36.8) 42 (37.5) 54 (36.2) Aortic root replacement 68 (26.1) 23 (20.5) 45 (30.2) Valve sparing root replacement 7 (2.7) 3 (2.7) 4 (2.7) Concomitant CABG 37 (14.2) 15 (13.4) 22 (14.8) 0.753 Femoral artery 26 (10.0%) 13 (11.6%) 13 (8.7%) Deep hypothermic circulatory arrest (Y/N) 50 (19.22%) 20 (17.9%) 30 (20.1%) 0.644 Operative times (min) CPB time (min) 184 (145, 233) 213.5 (167, 282) 166 (140, 215) <0.0001 Aortic Cross-clamp time (min) 93.5 (67, 146) 110 (75, 170) 87 (61, 141) 0.0019 Antegrade cerebral perfusion time (min) 23 (17, 32) 30 (22, 46) 19 (14.5, 27) <0.0001 Deep hypothermic circulatory arrest (min) 11 (3, 19) 15.5 (6.5, 21.5) 9 (3, 15) 0.1088 Lowest core temperature (C) 26 (24, 28.4) 25 (23, 27.3) 27 (24.8, 28.7) 0.001 Era of operation 0.018 2004 – 2012 82 (31.4%) 44 (39.3%) 38 (25.5%) 2013 – 2017 179 (68.6%) 68 (60.7%) 111 (74.5%)