Preoperative heparin

No preoperative heparin

p value

(N = 38)

(N = 102)

Age, years

68.7 ± 11.4

63.9 ± 15.3

<0.08

Sex, male

17 (44.7%)

54 (51.0%)

0.39

BW, kg

54.4 ± 10

59.5 ± 14

0.04

Baseline ACT, sec

170 ± 34

155 ± 21

<0.01

Number of reached to target ACT (≥400 sec)

25 (65.8%)

96 (94.1%)

< 0.01