Baseline characteristics of 108 711 patients who underwent cardiac surgery, by history of atrial fibrillation and by new-onset postoperative atrial fibrillation
| Characteristic | History of atrial fibrillation, % of patients* | New-onset postoperative atrial fibrillation, % of patients* | ||
|---|---|---|---|---|
| Yes n = 9 574 | No n = 99 137 | Yes n = 18 046 | No† n = 81 091 | |
| Demographic | ||||
| Age ≥ 65 yr | 72.7 | 51.7 | 68.1 | 48.0 |
| Female sex | 35.7 | 25.2 | 26.4 | 24.9 |
| Risk factor | ||||
| Congestive heart failure | 47.0 | 18.2 | 23.9 | 17.0 |
| Creatinine level, μmol/L, mean ± SD | 93.8 ± 32.4 | 91.7 ± 25.4 | 92.4 ± 22.8 | 91.5 ± 25.9 |
| Stroke or transient ischemic attack | 7.4 | 3.6 | 4.6 | 3.4 |
| Cerebrovascular disease | 16.9 | 10.3 | 12.5 | 9.7 |
| Diabetes mellitus | 27.9 | 30.2 | 29.3 | 30.4 |
| Dialysis | 1.8 | 1.1 | 1.0 | 1.1 |
| Hypertension | 47.3 | 33.7 | 35.4 | 33.3 |
| Left main coronary artery disease | 13.1 | 19.7 | 19.9 | 19.7 |
| Previous myocardial infarction | 19.3 | 23.0 | 22.7 | 23.1 |
| LV dysfunction (grade 2–4) | 51.8 | 49.6 | 48.3 | 49.9 |
| Reoperation | 7.5 | 3.3 | 3.5 | 3.2 |
| Peripheral vascular disease | 16.6 | 14.0 | 16.5 | 13.5 |
| CHADS2 score, mean ± SD | 1.63 ± 1.17 | 1.03 ± 1.02 | 1.20 ± 1.08 | 0.99 ± 1.01 |
| Type of cardiac surgery | ||||
| CABG | 48.1 | 79.6 | 71.0 | 81.5 |
| Valve | 31.8 | 11.2 | 14.8 | 10.4 |
| CABG + valve | 20.1 | 9.2 | 14.2 | 8.1 |
Note: CABG = coronary artery bypass graft surgery, CHADS2 = acronym for congestive heart failure, hypertension, age > 75 yr, diabetes mellitus, and prior stroke or transient ischemic attack, LV = left ventricular, SD = standard deviation.
↵* Unless stated otherwise.
↵† No history of atrial fibrillation and no postoperative atrial fibrillation.