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Table 2 Preoperative, operative and postoperative variables of the patients.

From: Off-pump versus on-pump coronary artery bypass grafting in acute coronary syndrome: a clinical analysis

  Off-pump
(n = 142)
On-pump
(n = 56)
Odds ratio P value
Onset of chest pain (hour) 5.53 (± 1.47) 5.94 (± 1.99) - 0.113
Chest pain ≤ 6 h 76.1% 60.7% 1.253 0.036
Chest pain > 6 h 23.9% 37.5% 0.638 0.080
Angiography/PCI to operation time (minute) 75.23 (± 23.53) 73.62 (± 21.34) - 0.582
Euroscore 5.47 (± 1.64) 7.08 (± 2.15) - 0.000
Ejection fraction (%) 43.08 (± 7.61) 42.75 (± 8.52) - 0.788
IABP     
   • Preoperative insertion 2 patients (1.4%) 2 patients (3.6%) 0.377 0.053
   • Postoperative insertion 3 patients (2.1%) 5 patients (8.9%) 0.986  
Postoperative inotrope (%) 9.2 16.1 0.526 0.208
Postoperative atrial fibrillation (%) 10.6 19.6 0.483 0.104
Peak Troponin-I level prior CABG (ng/mL) 2.05 (± 1.88) 2.56 (± 2.02) - 0.096
Number of grafts 2.57 2.73 - 0.166
   • One graft 8 (5.6%) 2 (3.6%)   0.058
   • Two grafts 54 (38%) 17 (30.4%)   0.000
   • Three grafts 70 (49%) 31 (55.4%)   0.000
   • Four grafts 10 (7%) 6 (10.7%)   0.317
Operation time (min) 82.78 (± 18.47) 164.22 (± (27.12) - 0.000
ICU stay (day) 1.16 (± 0.36) 1.35 (± 0.58) - 0.006
Hospital stay (day) 6.13 (± 1.37) 7.28 (± 1.61) - 0.000
Conversion to on-pump 0 - - -
Surgical revision 2 patients (1.4%) 2 patients (3.6%) 0.386 0.317
Mortality 5 patients (3.5%) 3 patients (5.4%) 0.645 0.690
  1. IABP: Intra-aortic balloon pump; PCI: Percutaneous coronary intervention; CABG: coronary artery bypass grafting; ICU: Intensive care unit.