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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.