Table 1. Baseline characteristics of adult OHCA patients according to initial ECG rhythm.
| Non-shockable rhythm (N = 401) |
Shockable rhythm (N = 269) |
p-value | |
|---|---|---|---|
| Age, median [IQR] | 67 [53, 77] | 56 [47, 67] | <0.001 |
| Female, N(%) | 136 (34) | 52 (19) | <0.001 |
| Hypertension, N(%) | 169 (42) | 95 (35) | 0.009 |
| DM, N(%) | 98 (24) | 46 (17) | 0.005 |
| Dyslipidemia, N(%) | 21 (5) | 20 (7) | 0.077 |
| Arrest location, N(%) | <0.001 | ||
| Home | 249 (62) | 111 (41) | |
| Public | 94 (23) | 127 (47) | |
| Healthcare | 50 (13) | 20 (7) | |
| Unknown | 8 (2) | 11 (4) | |
| Bystander witnessed, N(%) | 272 (68) | 217 (81) | <0.001 |
| Bystander CPR, N(%) | 156 (39) | 161 (60) | <0.001 |
| First documented rhythm, N(%) | |||
| Asystole | 251 (63) | ||
| PEA | 110 (27) | ||
| Unknown | 40 (10) | ||
| Prehospital defibrillation, N(%) | 33 (8) | 251 (93) | <0.001 |
| Min to response*, median [IQR] | 6.0 [5.0, 9.0] | 6.0 [5.0, 8.0] | 0.493 |
| Min to transfer*, median [IQR] | 19.0 [13.0, 28.0] | 24.0 [15.0, 59.0] | <0.001 |
|
ED visit at working hour
(8 a.m. to 5 p.m.), N(%) |
111 (28) | 68 (25) | 0.549 |
| ED visit at weekend, N(%) | 100 (25) | 100 (37) | 0.001 |
| Hospital Course | |||
| Intubation, N(%) | 383 (96) | 235 (87) | <0.001 |
| Use of inotropics, N(%) | 329 (82) | 167 (62) | <0.001 |
| CAG, N(%) | 53 (13) | 149 (55) | <0.001 |
| PCI, N(%) | 20 (5) | 54 (20) | <0.001 |
| IABP, N(%) | 4 (1) | 18 (7) | <0.001 |
| ECMO, N(%) | 12 (3) | 20 (7) | 0.014 |
| Implantation of ICD, N(%) | 2 (1) | 29 (11) | <0.001 |
| Temporary pacing, N(%) | 4 (1) | 7 (3) | 0.196 |
| TTM, N(%) | 89 (22) | 120 (45) | <0.001 |
Abbreviations: OHCA, out-of-hospital cardiac arrest; ECG, electrocardiography; IQR, interquartile range; DM, diabetes mellitus; CPR, cardiopulmonary resuscitation; PEA, pulseless electrical activity; ED, emergency department; CAG, coronary angiography; PCI, percutaneous coronary intervention; IABP, intra-aortic balloon pump; ECMO, extracorporeal membrane oxygenation; ICD, implantable cardioverter defibrillator; TTM, targeted temperature management
*Min to response, minutes from EMS call to EMS arrival; Min to transfer, minutes from EMS arrival to ED arrival.