Table 2 Post-operative complications and outcome data of patients with ejection ≤40 % who underwent cardiac surgery: comparisons between survived and dead patients

 Post-operative AMI, n

19 (2.4 %)

17 (2.3 %)

2 (4.5 %)

0.3

 Post-operative peak troponin value, ng/ml

8.03 (4.4–15)

7.83 (4.3–14.35)

21.32 (8.07–29.73)

<0.001

 Post-operative AF, n

202 (26 %)

191 (26 %)

11 (25 %)

0.9

 LCOS, n

271 (35 %)

238 (32 %)

33 (75 %)

<0.001

 Inotropes more than 48 h, n

233 (30 %)

204 (28 %)

29 (66 %)

<0.001

 Cardiogenic shock, n

49 (6.3 %)

25 (3.4 %)

24 (55 %)

<0.001

 Post-operative peak creatinine value, mg/dl

1.3 ± 0.9

1.3 ± 0.9

1.5 ± 1.1

0.004

 AKI, n

195 (25 %)

157 (21 %)

38 (86 %)

<0.001

 RRT, n

46 (5.9 %)

24 (3.3 %)

22 (50 %)

<0.001

 Bleeding in the first 12 postoperative hours, ml

280 (200–400)

280 (200–400)

260 (180–425)

0.9

 Total post-operative bleeding, ml

460 (300–720)

460 (300–720)

585 (455–735)

0.2

 Need for blood products transfusion, n

263 (34 %)

232 (31 %)

31 (70 %)

<0.001

 RBC transfusions, n of units per patient

0 (0–1)

0 (0–1)

3 (0–6.5)

<0.001

 FFP transfusions, n of units per patient

0 (0–0)

0 (0–0)

0 (0–3)

<0.001

 PLT transfusions, n of units per patient

0 (0–0)

0 (0–0)

0 (0–0.5)

<0.001

 Neurological damage type 1, n

16 (2 %)

14 (1.9 %)

2 (4.5 %)

0.2

 Neurological damage type 2, n

22 (2.8 %)

19 (2.6 %)

3 (6.8 %)

0.12

 Severe pulmonary dysfunction, n

32 (4.1 %)

20 (2.7 %)

12 (27 %)

<0.001

 Tracheostomy, n

27 (3.5 %)

12 (1.6 %)

15 (34 %)

<0.001

 Need for re-intubation, n

23 (2.9 %)

13 (1.8 %)

10 (23 %)

< 0.001

 Sepsis, n

25 (3.2 %)

20 (2.7 %)

5 (11 %)

0.01

 Mediastinitis, n

6 (0.77 %)

3 (0.41 %)

3 (6.8 %)

0.003

 Duration of MV, hours

18 (12–48)

18 (12–43)

88 (34–288)

<0.001

 ICU stay, days

3 (1–5)

3 (1–5)

12 (4–19)

<0.001

 Hospital stay, days

7 (5–11)

7 (5–11)

15.5 (8–24)

<0.001

 Death, n

44 (5.6 %)