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Table 1 Baseline characteristics
| RVEF < 20% N = 216 | RVEF 20–30% N = 747 | RVEF > 30% N = 146 | p value | |
|---|---|---|---|---|
| Demographics | ||||
| Age (years) | 74 [67–79] | 70 [63–77] | 66 [58–73] | < 0.001* |
| Male sex (%) | 65 | 64 | 69 | 0.635 |
| Body weight (kg) | 76 [68–86] | 80 [71–90] | 83 [72–93] | 0.002* |
| Comorbidities (%) | ||||
| Diabetes mellitus | 18 | 21 | 16 | 0.367 |
| Peripheral vessel disease | 15 | 15 | 17 | 0.565 |
| TIA/CVA | 16 | 121 | 12 | 0.269 |
| Neurological dysfunction | 4 | 4 | 5 | 0.772 |
| COPD | 22 | 17 | 12 | 0.038* |
| Cardiac status (%) | ||||
| Recent myocardial infarction (< 90 days) | 12 | 12 | 9 | 0.602 |
| Previous cardiac surgery | 19 | 22 | 20 | 0.618 |
| Unstable angina | 4 | 5 | 1 | 0.036* |
| Preoperative LVEF (%) (TTE) | ||||
| - Good (> 55%) | 40 | 59 | 66 | |
| - Moderate (30–49%) | 33 | 26 | 24 | < 0.001* |
| - Poor (< 30%) | 27 | 15 | 10 | |
| Preoperative status | ||||
| Preoperative serum creatinine (μmol/l) | 88 [76–107] | 88 [75–102] | 89 [77–100] | 0.638 |
| Preoperative pulmonary hypertension (%) | 7 | 3 | 1 | 0.013* |
| Intraoperative characteristics | ||||
| Aortic cross-clamp (min) | 98 [71–129] | 97 [68–140] | 93 [64–133] | 0.578 |
| ECC (min) | 139 [96–187] | 137 [99–190] | 126 [89–182] | 0.363 |
| Procedure (%) | ||||
| CABG | 13 | 12 | 11 | 0.285 |
| Valve | 49 | 45 | 54 | |
| CABG + valve | 28 | 32 | 23 | |
| Other | 10 | 10 | 12 | |
| Risk scores | ||||
| APACHE IV | 52 [43–62] | 50 [40–59] | 46 [36–54] | < 0.001* |
| EuroSCORE I | 8 [6–10] | 7 [5–9] | 6 [4–8] | < 0.001* |
