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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)

From: Transit time flow measurement of coronary bypass grafts before and after protamine administration

  N all grafts N arterial grafts N venous grafts All Arterial grafts Venous grafts
Pre- protamine Post-protamine p value Pre-protamine Post-protamine p value Pre-protamine Post-protamine p value
MGF 1319 704 615 29 (17–47) 30 (18–49) 0.02 27 (17–44) 27 (17–45) 0.77 30 (18–52) 33 (20–53) <  0.001
PI 1319 704 615 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
DF 1088 607 481 68 (60–74) 66 (59–73) <  0.001 71 (65–76) 70 (63–76) <  0.001 62 (56–70) 61 (55–67) 0.12
BF 1298 695 603 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
  1. Data reported as median (25th percentile-75th percentile)
  2. BF Backflow, DF Diastolic fraction, MGF Mean graft flow, PI Pulsatility index, ONCAB On-pump coronary artery bypass, OPCAB Off-pump coronary artery bypass