Table 1.
Baseline and surgical characteristics
| Hyperoxia n = 25 | Normoxia n = 25 | |
|---|---|---|
| Demographics | ||
| Age, years | 66 (61–71) | 68 (66–71) |
| Male, n (%) | 25 (100) | 25 (100) |
| Body surface area, m2 | 2.1 (1.9–2.1) | 2.1 (1.9–2.0) |
| Caucasian race, n (%) | 25 (100) | 25 (100) |
| Medical history | ||
| Smoker, n (%) | 16 (64) | 17 (68) |
| Diabetes, n (%) | 6 (24) | 5 (20) |
| Hypertension, n (%) | 7 (28) | 13 (52) |
| Hypercholesterolaemia, n (%) | 5 (25) | 8 (32) |
| Renal insufficiency, n (%) | 1 (4) | 5 (20) |
| Cardiac arrest, n (%) | 1 (4) | 1 (4) |
| Cerebrovascular accident, n (%) | 1 (4) | 2 (8) |
| Cardiovascular history | ||
| Atrial fibrillation, n (%) | 3 (12) | 2 (8) |
| Myocardial infarction, n (%) | 14 (56) | 8 (32) |
| PCI, n (%) | 6 (24) | 6 (24) |
| Left ventricular function | ||
| Good, n (%) | 19 (76) | 17 (68) |
| Moderate, n (%) | 5 (20) | 6 (24) |
| Poor, n (%) | 1 (4) | 2 (8) |
| Baseline laboratory parameters | ||
| Troponin-T (μg/L) | 0.012 (0.009–0.016) | 0.014 (0.009–0.031) |
| CK (U/L) | 86 (57–126) | 77 (56–102) |
| CK-MB (μg/L) | 0 (0–1.9) | 0 (0–0) |
| Serum creatinine (mmol/L) | 78 (69–93) | 88 (74–108) |
| Haemoglobin (g/L) | 142 (139–148) | 140 (132–148) |
| Surgical characteristics | ||
| Number of grafts, n | 4 (3–4) | 4 (4–5) |
| Surgery time, min | 240 (212–283) | 245 (220–280) |
| CPB time, min | 103 (85-122) | 103 (95-133) |
| Cross clamp time, min | 66 (56-80) | 69 (60-85) |
| Blood cardioplegia, n (%) | 2 (8) | 6 (24) |
Data are presented as median (interquartile range) unless otherwise stated. Renal insufficiency was defined as an estimated glomerular filtration rate <60 mL/min. CK creatine kinase, CPB cardiopulmonary bypass, MB muscle/brain, PCI percutaneous coronary intervention