In-hospital events in patients with or without atrial fibrillation (AF)
| Event | Without AF (n=16 363) | With AF (n=1386) | p Value |
| Clinical evidence of heart failure | 23.6 | 51.5 | < 0.0001 |
| Congestive heart failure > 4 days | 3.8 | 12.1 | < 0.0001 |
| Reinfarction + postinfarction angina | 13.8 | 15.3 | NS |
| Sustained ventricular tachycardia | 1.9 | 4.3 | < 0.0001 |
| Ventricular fibrillation | 2.3 | 4.4 | < 0.0001 |
| Death in hospital | 5.0 | 12.6 | < 0.0001 |
| Stroke | 0.7 | 0.8 | NS |
The data are percentages.
The p values (2p) are derived from χ2 tests for heterogeneity. The worse in-hospital outcome of the patients with atrial fibrillation is clearly apparent.