Intraoperative characteristics

VariableUnmatchedMatched
Composite valve graft
(n = 248)
Stentless aortic root
(n = 346)
P valueComposite valve graft
(n = 212)
Stentless aortic root
(n = 212)
P value
Total duration of operation, mean ± SD388.5 ± 132.5398.5 ± 137.10.189386.1 ± 132.0369.1 ± 122.00.084
Mean CPB time, mean ± SD195.1 ± 88.7203.2 ± 820.126195.4 ± 89.4183.1 ± 65.10.052
Mean cross clamp time, mean ± SD134.1 ± 44.1159.6 ± 113.3< 0.001135.3 ± 43.8150.8 ± 136.30.058
Mean circulatory arrest time (min), mean ± SD6.6 ± 15.72.1 ± 12< 0.0016.46 ± 15.72.37 ± 14.10.003
Lowest temperature, mean ± SD29.5 ± 631.1 ± 4.2< 0.00129.7 ± 5.831.4 ± 4.3< 0.001
Cardioplegia temperature, n (%)0.200.071
    Cold
    Warm
    Cold & warm
238 (96)
3 (1.2)
7 (2.8)
318 (91.9)
6 (1.7)
22 (6.4)
203 (95.8)
2 (0.9)
7 (3.3)
195 (92.0)
5 (2.4)
12 (5.7)
Cardioplegia infusion mode, n (%)0.0670.366
    Antegrade
    Retrograde
    Mixed
144 (58.1)
0 (0)
104 (41.9)
178 (51.4)
3 (0.9)
165 (47.7)
118 (55.7)
0 (0)
94 (44.3)
120 (56.6)
3 (1.4)
89 (42.0)
Number of valves replaced, n (%)0.2030.108
    1
    2
    3
230 (92.7)
16 (6.5)
2 (0.8)
305 (88.2)
36 (10.4)
5 (1.4)
157 (74.1)
15 (7.1)
2 (0.9)
142 (67.0)
17 (8.0)
1 (0.5)
CABG, n (%)0.0350.222
    Yes
    No
39 (15.7)
209 (84.3)
74 (21.6)
271 (78.3)
34 (16.0)
178 (84.0)
40 (18.9)
172 (81.1)
Number of distal coronary anastomoses, n (%)0.0160.256
    0
    1
    2
    3
209 (84.3)
29 (11.7)
7 (2.8)
3 (1.2)
272 (78.6)
44 (12.7)
22 (6.4)
8 (2.3)
178 (84.0)
24 (11.3)
7 (3.3)
3 (1.4)
173 (81.6)
26 (12.3)
10 (4.7)
3 (1.4)

CABG: coronary artery bypass grafting; CPB: cardiopulmonary bypass