Table 1 Main characteristics of the patients (n = 51)

Mean age ± SD, yr

42 ± 15

13-70

Men, n (%)

46 (90%)

Women, n (%)

5 (10%)

Comorbidity, n (%)

   Hypertension

6 (12%)

   Diabetes mellitus

3 (6%)

   Ischemic heart disease

11 (20%)

   Other cardiac disease

10 (20)

Site of cardiac arrest, n (%)

   Home

19 (37%)

   Work

6 (12%)

   Public

20 (39%)

   Sport

6 (12)

Initial rhythm, n (%)

   Ventricular fibrillation

32 (63%)

   Asystole

15 (29%)

   Pulseless rhythm

4 (8%)

Defibrillation

   Patients receiving shock, n (%)

37 (72%)

   Number of shocks, n (25th to 75th IQR)

4 (2 to 6)

1-20

Epinephrine

   Patients receiving epinephrine, n (%)

51 (100%)

   Dose (mg)

13 (10 to 20)

2-100

Mean end tidal CO₂ ± SD, mmHg

22 ± 12

0-50

Delay, median (25th to 75th IQR)

   Fall to basic CPR, min

3 (1 to 6)

0-22

   Fall to advanced CPR, min

12 (5 to 23)

0-40

   Fall to automated CPR, min

41 (30 to 55)

15-110

   Fall to ICU admission, min

90 (65 to 115)

48-175

   Fall to ECLS onset, min

120 (102 to 149)

75-195

Biological measurement

   Arterial pH

6.93 ± 0.17

6.56-7.25

   Mean blood lactate ± SD, mM L^-1

19.9 ± 6.7

7.7-40.8

   Mean arterial bicarbonate ± SD, mM L^-1

16.5 ± 12.1

1.9-58.7

   Mean PaO₂ ± SD, mmHg

135 ± 129

6-489

   Mean PaCO₂ ± SD, mmHg

69 ± 25

19-128

   Mean blood potassium ± SD^a, mM L^-1

5.1 ± 1.7

2.7-10.5

   Mean serum creatinine ± SD, μM L^-1

129 ± 30

51-275

   Mean prothrombin time, %

39 ± 16

11-66

   Median fibrinogene, g L^-1 (25th to 75th IQR)

1.3 (<0.6 to 1.6)

<0.6-3.6

   Mean hemoglobin ± SD, g L^-1

109 ± 25

59-169

   Median troponin Ic, μg L^-1 (25th to 75th IQR)

3.98 (0.93 to 85.5)

0-669.0

   Median protein S100^b, μg L^-1 (25th to 75th IQR)

4.2 (2.4 to 10.4)

0-36.0