Clinical information
| No ventricular fibrillation | Ventricular fibrillation | ||||||
|---|---|---|---|---|---|---|---|
| ECG analysis included | ECG analysis excluded | ECG analysis included | ECG analysis excluded | ||||
| Female | 49/149 (33%) | 11/40 (28%) | 3/8 | 1/4 | |||
| β Blocker | 39/149 (26%) | 8/40 (20%) | 0/8 | 1/4 | |||
| Previous myocardial infarction | 56/149 (38%) | 20/40 (50%) | 5/8 | 2/4 | |||
| Previous coronary bypass | 5/149 (3%) | 5/40 (8%) | 0/8 | 1/4 | |||
| Left ventricular failure | 38/138 (28%) | 18/38 (47%) | 4/8 | 2/4 | |||
| Mortality | 10/149 (7%) | 3/40 (8%) | 2/8 | 0/4 | |||
| Age (years) | 65 (12), 63 to 66 | 68 (7), 65 to 70 | 62 (12), 49 to 74 | 68 (6), 52 to 84 | |||
| Infarct score (%) | 10.4 (9.3), 8.9 to 12.0 | 9.9 (9.0), 7.0 to 12.8 | 9.7 (9.5), 1.7 to 17.6 | 19.3 (17.2), 0 to 62 | |||
| Peak CK-MB (units/l) | 83 (79), 69 to 97 | 88 (83), 61 to 116 | 82 (21), 48 to 115 | 208 (80), 9 to 406 | |||
| Serum potassium (mmol/l) | 4.19 (0.52), 4.09 to 4.28 | 4.28 (0.54), 4.13 to 4.42 | 4.22 (0.20), 4.00 to 4.43 | 3.73 (0.25), 3.11 to 4.36 | |||
| Mean arterial pressure on admission (mm Hg) | 96 (22), 92 to 100 | 97 (17), 92 to 103 | 100 (18), 79 to 124 | 81 (17), 40 to 122 | |||
Categorical variables are given as n (%), continuous variables as mean (SD), 95% confidence interval.