Table 2 Transit-time flowmetry parameters before and after administration of protamine: single grafts with pre- and post-protamine TTFM with ACI > 30 (both pre- and post-protamine)

29 (17–47)

30 (18–49)

0.02

27 (17–44)

27 (17–45)

0.77

30 (18–52)

33 (20–53)

<  0.001

2.3 (1.7–3.2)

2.1 (1.6–2.8)

<  0.001

2.3 (1.8–3.0)

2.2 (1.8–2.8)

<  0.001

2.3 (1.7–3.4)

2.0 (1.5–2.8)

<  0.001

68 (60–74)

66 (59–73)

<  0.001

71 (65–76)

70 (63–76)

<  0.001

62 (56–70)

61 (55–67)

0.12

0.7 (0–3.0)

0.7 (0–2.9)

0.41

1.0 (0–3.9)

1.1 (0.1–3.7)

0.67

0.4 (0–2.1)

0.3 (0–2.0)

0.39