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Table 1 Description of the population included at the beginning of ECMO support

From: Levosimendan in patients undergoing extracorporeal membrane oxygenation after cardiac surgery: an emulated target trial using observational data

 

Levosimendan

p-value

No (n = 174)

Yes (n = 65)

On admission

Age (years)

Median [Q1–Q3]

 

62 [54–70]

62 [58–72]

0.725

Sex

Female

 

67 (39%)

22 (34%)

0.507

BMI (Kg/m2)

Median [Q1–Q3]

 

27 [24-31]

25 [22–28]

0.015

 

N (NA)

 

173 (1)

65 (0)

 

Medical conditions

Hypertension

 

99 (57%)

36 (55%)

0.834

 

Diabetes

 

40 (23%)

20 (31%)

0.217

 

Dyslipidemia

 

59 (34%)

26 (40%)

0.381

 

COPD

 

18 (10%)

6 (9%)

0.799

 

Peripheral vascular disease

 

16 (9%)

9 (14%)

0.278

  

N (NA)

175 (0)

64 (1)

 
 

Chronic heart failure

 

131 (78%)

49 (77%)

0.758

  

N (NA)

168 (7)

64 (1)

 
 

Previous sternotomy

 

67 (39%)

20 (31%)

0.269

 

Chronic kidney disease

 

49 (28%)

18 (28%)

0.943

SAPS II

Median [Q1–Q3]

 

24 [5–51]

56 [13–64]

0.0004

 

N (NA)

 

173 (1)

64 (1)

 

Euroscore

Median [Q1–Q3]

 

3.9 [2–10.3]

6.4 [2-25]

0.047

 

N (NA)

 

172 (8)

64 (4)

 

Type of surgery

CABG

 

13 (7%)

10 (15%)

0.262

 

Valvular surgery

 

55 (32%)

18 (28%)

 
 

Combined valvular and CABG

 

20 (11%)

4 (6%)

 
 

Heart transplant

 

65 (37%)

26 (40%)

 
 

LVAD

 

0 (0%)

1 (2%)

 
 

TAVI

 

1 (1%)

0 (0%)

 
 

Other

 

20 (11%)

6 (9″)

 

In the operating room

CPB duration (minutes)

Median [Q1–Q3]

 

142 [110–180]

136 [98–190]

0.463

 

N (NA)

 

172 (2)

65 (0)

 

Aortic cross-clamping (minutes)

Median [Q1–Q3]

 

85 [67–124]

77 [55–127]

0.292

 

N (NA)

 

163 (11)

62 (3)

 

RBC (units)

Median [Q1–Q3]

 

2 [0–6]

2 [0–5]

0.552

 

N (NA)

 

169 (5)

64 (1)

 

Frozen plasma (units)

Median [Q1–Q3]

 

3 [0–6]

2 [0–6]

0.224

 

N (NA)

 

169 (5)

64 (1)

 

Platelets (units)

Median [Q1–Q3]

 

1 [0–1]

1 [0–1]

0.660

 

N (NA)

 

169 (5)

64 (1)

 

Fibrinogen

Yes

 

57 (34%)

20 (31%)

0.741

 

N (NA)

 

171 (4)

64 (1)

 

At ECMO implantation

Timing

Intraoperative

 

126 (72%)

51 (78%)

0.3425

 

Postoperative

 

48 (28%)

14 (22%)

 

Ventricular failure at implantation

Left

 

28 (16%)

22 (34%)

0.008

 

Right

 

20 (11%)

8 (12%)

 
 

Right and left

 

126 (72%)

35 (54%)

 

ECMO site

Central

 

13 (7%)

3 (5%)

0.568

SOFA

Median [Q1–Q3]

 

11 [10–13]

11 [10–12]

0.341

 

N (NA)

 

136 (38)

57 (8)

 

Daily total dose of epinephrine (mg)

Mean (SD)

 

13 (27.9)

6.8 (15.2)

0.070

 

N (NA)

 

172 (2)

65 (0)

 

Daily total dose of norepinephrine (mg)

Median [Q1–Q3]

 

17.6 [6.2–42.2]

15.4 [4.1–38.1]

0.312

 

N (NA)

 

172 (2)

65 (0)

 

Daily total dose of dobutamine (mg)

Median [Q1–Q3]

 

226.3 [0–517.3]

365.5 [28.1–615.6]

0.041

 

N (NA)

 

172 (2)

65 (0)

 

VIS

Median [Q1–Q3]

 

26.8 [13.3–52.9]

23.6 [13.8–40.4]

0.275

 

N (NA)

 

172 (2)

65 (0)

 

Lactate

Median [Q1–Q3]

 

5.6 [3.4–8.9]

5.3 [3–7.9]

0.160

 

N (NA)

 

157 (17)

59 (6)

 

ECMO output (L/min/m2)

Median [Q1–Q3]

 

1.8 [1.5–2.1]

1.9 [1.4–2.2]

0.686

 

N (NA)

 

131 (43)

55 (10)

 

Impella®

Yes

 

12 (7%)

4 (6%)

1.000

Delay between CPB cessation and ECMO implantation (hours)

Mean (SD)

 

8.4 (26.4)

7.4 (28.5)

0.295

 

N (NA)

 

163 (11)

64 (1)

 

Delay between ECMO implantation and levosimendan infusion (days)

Median [Q1–Q3]

 

-

5 [3–6]

 

Events under ECMO

IABP

 

73 (42%)

27 (42%)

0.954

 

Digestive bleeding

 

25 (14%)

13 (20%)

0.289

 

Acute mesenteric ischemia

 

37 (22%)

5 (8%)

0.014

  

N (NA)

173 (2)

64 (1)

 
 

Acute kidney injury

 

136 (79%)

44 (68%)

0.0804

  

N (NA)

174 (1)

64 (1)

 
 

Extra-renal replacement therapy

 

96 (55%)

33 (51%)

0.543

 

Stroke

 

13 (7%)

13 (20%)

0.006

 

Mediastinitis

 

15 (9%)

10 (15%)

0.128

 

Bacteremia

 

52 (30%)

27 (42%)

0.088

 

Septic shock

 

85 (49%)

36 (55%)

0.369

 

Hemorrhagic shock

 

83 (48%)

30 (46%)

0.831

 

Cardiac arrest

 

29 (17%)

8 (12%)

0.407

 

Acute coronary syndrome

 

14 (8%)

1 (2%)

0.076

 

VAP

 

110 (63%)

47 (72%)

0.188

 

Limb ischemia

 

25 (15%)

8 (13%)

0.708

  

N (NA)

172 (3)

63 (2)

 
 

Scarpa infection

 

18 (11%)

8 (13%)

0.650

  

N (NA)

161 (4)

63 (2)

 
 

Surgical revision of the ECMO implantation site

 

26 (15%)

10 (16%)

0.937

  

N (NA)

172 (3)

64 (1)

 
  1. BMI, body mass index; CABG, coronary artery bypass graft; CPB, cardiopulmonary bypass; COPD, chronic obstructive pulmonary disease; ECMO, extracorporeal membrane oxygenation; IABP, intra-aortic balloon pump; LVAD, left ventricular assist device; NA, not available (missing data); Q1, first quartile; Q3, third quartile; RBC, red blood cells; SAPS II, Simplified Acute Physiology Score II; SOFA, Sequential Organ Failure Assessment; TAVI, transcatheter aortic valve implantation; VAP, ventilator-associated pneumonia; VIS, vasoactive inotropic score. For covariates which the median was null in both groups, they were described with their mean and standard deviation