Table 1.
Population characteristics by treatment (intention-to-treat).
| Total n = 31 |
AMSA-CPR n = 19 |
Standard-CPR n = 12 |
|
|---|---|---|---|
| Cluster, SOREU, Milan n (%) | 19 (51) | 12 (63) | 7 (58) |
| Gender, male n (%) | 24 (77) | 15 (79) | 9 (75) |
| Age, year | 68 [58–73] | 65 [55–75] | 70 [60–73] |
| Pre-arrest CPC 1, n (%) | 30 (100) | 18 (100) | 12 (100) |
| Charlson index | 3.0 [2.0–4.0] | 3.5 [2.3–5.0] | 3.0 [1.0–4.0] |
| STEMI, n (%) | 12 (39) | 7 (37) | 5 (42) |
| NSTEMI, n (%) | 4 (13) | 1 (5) | 3 (25) |
| No MI, n (%) | 3 (10) | 1 (5) | 2 (17) |
| Unknown,a n (%) | 12 (39) | 10 (53) | 2 (17) |
| Successful PCI, n (%) | 13 (42) | 7 (37) | 6 (50) |
| No PCI, n (%) | 6 (19) | 2 (11) | 4 (33) |
| Unknown°, n (%) | 12 (39) | 10 (53) | 2 (17) |
| Witnessed cardiac arrest, n (%) | |||
| Yes, lay bystander | 22 (71) | 13 (68) | 9 (75) |
| Yes, EMS | 7 (23) | 4 (21) | 3 (25) |
| No | 2 (7) | 2 (11) | 0 |
| Bystander CPR before EMS arrival, n (%) | |||
| Yes, complete | 4 (13) | 3 (16) | 1 (8) |
| Yes, compressions only | 15 (48) | 8 (42) | 7 (58) |
| No | 10 (32) | 6 (32) | 4 (33) |
| Unknown | 2 (7) | 2 (11) | 0 |
| EMS arrival time, min | 10 [7–12] | 10 [9–12] | 10 [6–12] |
| Patients receiving adrenaline, n (%) | 22 (71) | 15 (79) | 7 (58) |
| Patients receiving amiodarone, n (%) | 17 (55) | 14 (74) | 3 (25) |
| Chest compression depth, cm | 4.55 [4.27–5.12] | 4.73 [4.16–5.34] | 4.38 [4.27–4.68] |
| Chest compression rate, CC/min | 123 [112–139] | 129 [112–141] | 117 [113–131] |
| Chest compression fraction, (%) | 73.7 [66.3–78.5] | 71.9 [66.0–81.1] | 74.6 [43.3–78.4] |
Median [IQR] or n (%).
a
Unknown because patients were not resuscitated.