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Background  Use of minimally invasive approaches for isolated aortic valve or ascending aorta surgery is increasing. However, total arch replacement or aortic root repair through a minimally invasive incision is rare. This study was performed to report our initial experience with surgery of the ascending aorta with complex procedures through an upper mini-sternotomy approach.    Methods  We retrospectively analyzed 80 patients who underwent ascending aorta replacement combined with complex procedures including hemi-arch, total arch, and aortic root surgeries from September 2010 to May 2018. Using standard propensity score-matching analysis, 36 patients were matched and divided into 2 groups: the upper mini-sternotomy group ( n  = 18) and the median sternotomy group (n = 18). The preoperative assessment revealed no statistically significant differences between the two groups.    Results  Hospital mortality occurred in one patient (2.8%). The mini-sternotomy group showed a longer cross-clamping time (160 ± 38 vs. 135 ± 36 min,  p  = 0.048) due to higher rate of valve-sparing aortic root replacement and total arch repair. The cardiopulmonary bypass time in mini-sternotomy group was shorter than that of full sternotomy group (209 ± 47 min vs 218 ± 62 min,  p  = 0.595) but fell short of significance. There was no significant difference in lower body hypothermia circulatory arrest time between the two groups (40 ± 10 min vs 48 ± 20 min,  p  = 0.139). The upper mini-sternotomy group displayed a shorter ventilation time (22 vs. 45 h,  p  = 0.014), intensive care unit stay (4.6 ± 2.7 vs. 7.9 ± 3.7 days,  p  = 0.005), and hospital stay (8.2 ± 3.8 vs. 21.4 ± 11.9 days,  p  = 0.001). The upper mini-sternotomy group showed a lower postoperative red blood cell transfusion volume (4.6 ± 3.3 vs. 6.7 ± 5.7 units,  p  = 0.042) and postoperative drainage volume (764 ± 549 vs. 1255 ± 745 ml,  p  = 0.034). The rates of dialysis for newly occurring renal failure, neurological complications, and re-exploration were similar between the two groups ( p  = 1.000).    Conclusion  The upper mini-sternotomy approach is safe and beneficial in ascending aorta surgery with complex procedures for aortic dissection, including total arch replacement and aortic root repair.

Surgery of ascending aorta with complex procedures for aortic dissection through upper mini-sternotomy versus conventional sternotomy