Hypothermia during Surgical Treatment of Type A Aortic Dissection: A 16 Years’ Experience
Table 2
Intraoperative data.
Variables
All pts
Group LT
Group HT
value
()
()
()
Mean ± SD
Mean ± SD
Mean ± SD
(%)
(%)
(%)
Cardiopulmonary bypass time (minutes)
208.4 ± 77.1
210.7 ± 78.5
206.9 ± 76.4
0.742
Cross-clamp time (minutes)
111.1 ± 63.1
102.3 ± 53.3
116.8 ± 68.2
0.101
Circulatory arrest time (minutes)
52.3 ± 35.8
62.7 ± 44.7
45.7 ± 26.8
<0.001
Circulatory arrest temperature (°C)
23.6 ± 2.7
21.1 ± 2.2
25.3 ± 1.3
<0.001
Surgical strategy
(i) Isolate ascending aorta replacement
101 (41.9)
41 (43.6)
60 (40.8)
0.912
(ii) Hemiarch replacement
34 (14.1)
12 (12.8)
22 (15.0)
(iii) Arch replacement
27 (11.2)
9 ( 9.6)
18 (12.2)
(iv) Ascending aorta and aortic valve replacement
41 (17.0)
18 (19.1)
23 (15.6)
(v) Bentall procedure
34 (14.1)
12 (12.8)
22 (15.0)
(vi) Cabrol procedure
4 (1.7)
2 (2.1)
2 (1.4)
CABG
32 (13.3)
10 (10.6)
22 (15.0)
0.437
values refers to Mann–Whitney test for the quantitative data and to chi square test or Fisher’s exact probability test (in case of two-by-two contingency tables) for the categorical data. CABG: Coronary artery bypass graft surgery; pts: patients; Group LT: arrest circulation temperature <24°C; Group HT: higher arrest temperature ≥24°C.
