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Patient characteristics.
| Higher-FIO2 group (FIO2 > 0.85, n = 21) | Lower-FIO2 group (FIO2 < 0.7, n = 21) | |
| Preoperative data | ||
| Age (yrs) | 60 ± 13 | 63 ± 13 |
| Gender (M/F) | 12/9 | 16/5 |
| Ejection fraction (%) | 65 ± 13 | 56 ± 17 |
| Pulmonary Hypertension: Moderate/Severe | 3/0 | 4/1 |
| Ventilatory impairment in pulmonary function test: moderate/severe | 4/1 | 6/1 |
| HTN | 10 | 10 |
| DM | 8 | 11 |
| CVA history | 2 | 3 |
| ESRD | 2 | 2 |
| Operation | ||
| CABG | 9 | 11 |
| Valve | 10 | 10 |
| Aortic Root | 2 | 0 |
| TD-CO | 3.6 ± 1.5 | 3.6 ± 0.6 |
