Table 2:
Surgical characteristics of treated patients
| Variable | Group HM (N=92) | Group LM (N=87) | Group DP (N=94) |
|---|---|---|---|
| Duke | 42 (45.7%) | 42 (48.3%) | 44 (46.8%) |
| Emory | 29 (31.5%) | 25 (28.7%) | 25 (26.6%) |
| Penn | 12 (13.0%) | 13 (14.9%) | 13 (13.8%) |
| Baylor | 9 (9.8%) | 7 (8.1%) | 12 (12.8%) |
| Hemi-Arch Repair | 85 (92.4%) | 81 (93.1%) | 85 (90.4%) |
| Total Arch Repair | 7 (7.6%) | 6 (6.9%) | 9 (9.6%) |
| Concomitant CABG | 12 (13.0%) | 7 (8.0%) | 16 (17.0%) |
| Concomitant Aortic Valve | 56 (60.9%) | 59 (67.8%) | 57 (60.6%) |
| Concomitant Aortic Root | 19 (20.7%) | 16 (18.4%) | 17 (18.1%) |
| Cooling time, median [Q1, Q3] * , minutes | 31 [23, 44] | 35 [26, 43] | 42 [34, 58] |
| Cross clamp time, median [Q1, Q3], minutes | 123 [97, 154] | 117 [91, 150] | 121 [108, 159] |
| CPB duration, median [Q1, Q3], minutes | 158 [133.5, 192] | 156 [131, 194] | 161 [141, 197] |
| ACP time, median [Q1, Q3], minutes | 17 [13, 23] | 15 [12, 24] | 15 [12, 22] |
| Lower body HCA time, median [Q1, Q3], minutes | 17 [13, 24] | 16 [12, 24] | 16 [12, 24] |
| Rewarming time, median [Q1, Q3] ** , minutes | 102 [77, 127] | 96 [76, 125] | 100 [83, 125] |
| Surgery duration *** , median [Q1, Q3], minutes | 300 [247, 376] | 282 [238, 354] | 305 [259, 373] |
*
Cooling time was significantly different between the high-moderate (HM) and deep (DP) temperature groups and between the low-moderate (LM) and DP temperature groups (both P<.001).
**
Rewarming time defined as time from start of full flow CPB after completion of lower body HCA to separation from CPB. CABG = coronary artery bypass grafting, CPB = cardiopulmonary bypass, ACP = antegrade cerebral perfusion, HCA = hypothermic circulatory arrest;
***
Surgery duration defined as anesthesia start time to anesthesia end time.