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Table 1 Preoperative profile and operative data

From: Hyperlactatemia during cardiopulmonary bypass: determinants and impact on postoperative outcome

Variable Number (percentage)
or
mean ± standard deviation
Age (years) 64.5 ± 14.2
Male gender 324 (69)
Body surface area (m2) 1.81 ± 0.18
Left ventricle ejection fraction 0.51 ± 0.12
Unstable angina 36 (7.7)
Previous vascular surgery 19 (4.1)
Previous cardiac surgery 39 (8.3)
Recent myocardial infarction 113 (24)
Congestive heart failure 30 (6.4)
Cardiogenic shock 5 (1.1)
Preoperative intra-aortic balloon pump 4 (0.8)
Active endocarditis 7 (1.5)
Dialytic treatment 4 (0.8)
Diabetes on medication 56 (12)
Chronic obstructive pulmonary disease 19 (4.1)
Previous cerebrovascular accident 33 (7)
Hematocrit (percentage) 39.8 ± 4.6
Serum creatinine value (mg/dl) 1.1 ± 0.8
Isolated coronary operation 211 (45)
Isolated valve operation 138 (29)
Combined operation 121 (26)
CPB duration (minutes) 81 ± 41
Lowest hematocrit on CPB (percentage) 27 ± 3.5
Lowest oxygen delivery on CPB (ml/minute per m2) 291 ± 44
Lowest temperature on CPB (°C) 31 ± 1.9
Peak blood lactate (mmol/l) 1.5 ± 1.3
Peak blood glucose (mg/dl) 133 ± 47
  1. CPB, cardiopulmonary bypass.