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* |