Table 1.
Main characteristics of the patients (n = 51)
| Variable | Values | Range |
|---|---|---|
| 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 ± SDa, 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 S100b, μg L-1 (25th to 75th IQR) | 4.2 (2.4 to 10.4) | 0-36.0 |
CPR, cardiopulmonary resuscitation; ECLS, extracorporeal life support; ICU, intensive care unit; IQR, interquartile range; PaCO2, partial pressure of carbon dioxide; PaO2, partial pressure of oxygen; troponin Ic, cardiac troponin I.
aBlood potassium could not be measured in four patients because of hemolysis; bProtein S100 was measured in only 27 patients.