| All patients | Non-shockable rhythm | Shockable rhythm | p-value |
---|---|---|---|---|
 | n = 186 | n = 62 | n = 124 |  |
Age, median (IQR) | 59 (48, 65) | 60 (49, 66) | 58 (46, 65) | 0.24 |
Sex, male, n (%) | 158 (85) | 46 (74) | 112 (90) | < 0.01 |
Witness, n (%) | 169 (91) | 59 (95) | 110 (89) | 0.19 |
Bystander CPR, n (%) | 119 (64) | 51 (82) | 68 (55) | < 0.01 |
Cardiac arrest after EMS personnel arrival, n (%) | 55 (30) | 41 (66) | 14 (11) | < 0.01 |
Low flow time, median (IQR) | 41 (33, 48) | 40 (31, 51) | 41 (34, 48) | 0.84 |
Transient ROSC, n (%) | 36 (19) | 12 (19) | 24 (19) | 1 |
Etiology, n (%) | Â | Â | Â | 0.06 |
Acute coronary syndrome | 77 (41) | 22 (36) | 55 (44) | Â |
Vasospastic angina | 5 (3) | 2 (3) | 3 (2) | Â |
Idiopathic ventricular fibrillation | 42 (23) | 1 (2) | 41 (33) | Â |
Cardiomyopathy | 16 (9) | 4 (6) | 12 (10) | Â |
Pulmonary embolism | 10 (5) | 9 (15) | 1 (1) | Â |
Accidental hypothermia | 3 (2) | 2 (3) | 1 (1) | Â |
Aortic dissection | 11 (6) | 6 (10) | 5 (4) | Â |
Respiratory failure | 7 (4) | 7 (11) | 0 | Â |
Others | 15 (8) | 9 (15) | 6 (5) | Â |
Coronary angiography | 137 (74) | 31 (50) | 106 (86) | < 0.01 |