Table 3. Perioperative characteristics.
| Variable | Overall LVEF <50% (n = 557) |
Group 1 LVEF 40%–49% (n = 294) |
Group 2 LVEF 30%–39% (n = 145) |
Group 3 LVEF <30% (n = 118) |
P |
|---|---|---|---|---|---|
| Low cardiac output, n (%) | 24 (4.3) | 8 (2.7) | 5 (3.4) | 11 (9.3) | 0.010 |
| IABP, n (%) | 17 (3.0) | 4 (1.3) | 5 (3.4) | 8 (6.7) | 0.015 |
| ECMO, n (%) | 2 (0.3) | 0 (0) | 1 (0.7) | 1 (0.8) | 0.318 |
| Myocardial infarction, n (%) | 4 (0.7) | 0 (0) | 3 (2.1) | 1 (0.8) | 0.053 |
| New onset of AFIB, n (%) | 226 (40.5) | 116 (39.4) | 62 (42.1) | 49 (41.5) | 0.847 |
| Reoperation due to bleeding, n (%) | 33 (6) | 18 (6.1) | 9 (6.2) | 6 (5.1) | 0.909 |
| Major stroke, n (%) | 16 (2.8) | 10 (3.4) | 4 (2.8) | 2 (1.6) | 0.641 |
| Sepsis, n (%) | 8 (1.4) | 4 (1.3) | 3 (2.1) | 1 (0.8) | 0.701 |
| AKI on dialysis, n (%) | 20 (3.5) | 9 (3.1) | 7 (4.8) | 4 (3.3) | 0.640 |
| Transfusion of blood units, n | 1.7 ± 4.8 | 1.6 ± 4.2 | 2.2 ± 6.5 | 1.3 ± 3.5 | 0.275 |
| Respiratory failure, n (%) | 54 (9.7) | 23 (7.8) | 23 (15.9) | 8 (6.7) | 0.013 |
| 30-day mortality, n (%) | 18 (3.2) | 4 (1.4) | 5 (3.4) | 9 (7.6) | <0.001 |
AFIB: atrial fibrillation; AKI: acute kidney injury; ECMO: extracorporeal membrane oxygenation; IABP: intra-aortic balloon pulsation; LVEF: left ventricular ejection fraction