ACT ≥ 400 s (N = 121)

ACT < 400 s (N = 19)

p value

Age, years

63.9 ± 14.8

73.7 ± 8.35

<0.01

Sex, male

63 (52.1%)

8 (42.1%)

0.42

BW, kg

59.3 ± 13.2

50.5 ± 10.0

<0.01

BMI, kg/m²

23.3 ± 3.9

21.1 ± 3.1

<0.01

Baseline ACT, sec

158 ± 26

165 ± 25

0.32

Platelets ≥ 3 × 10⁵/mm³

6 (5.0%)

0 (0.0%)

0.95

Preoperative heparin therapy

25 (20.7%)

13 (68.4%)

<0.01