Table 4.
Initial postoperative surface electrocardiogram of subjects with no atrial fibrillation (NAFIB) and atrial fibrillation (AFIB)
| Characteristica | NAFIB | AFIB | p |
|---|---|---|---|
| Rhythm, n (%) | 0.121 | ||
| Normal sinus (NSR) | 275 (74.1) | 113 (64.6) | |
| NSR with 1° block | 22 (5.9) | 24 (13.7) | |
| Sinus bradycardia (SB) | 20 (5.4) | 5 (2.9) | |
| SB with 1° block | 4 (1.1) | 4 (2.3) | |
| Sinus tachycardia (ST) | 42 (11.5) | 22 (12.5) | |
| ST with 1° block | 2 (0.5) | 0 | |
| AV dissociation | 1 (0.3) | 0.1 (0.6) | |
| Paced | 0 | 0.1 (0.6) | |
| Junctional | 0 | 0 | |
| Other | 4 (1.1) | 4 (2.2) | |
| Rate/duration | |||
| Ventricular rate, bpm | 80.7 ± 15.7 | 82.7 ± 16.3 | .186 |
| Atrial rate, bpm | 80.7 ± 15.6 | 82.4 ± 15.9 | .250 |
| PR, ms | 171.6 ± 82.6 | 175.7 ± 37.9 | .542 |
| QRS, ms | 100.2 ± 20.7 | 102.1 ± 22.2 | .341 |
| QT, ms | 405.4 ± 53.3 | 403.0 ± 53.7 | .620 |
| QTc, ms | 474.4 ± 11.7 | 466.1 ± 45.8 | .605 |
| P axis, degrees | 48.9 ± 21.1 | 45.2 ± 26.6 | .077 |
| R axis, degrees | 14.5 ± 44.4 | 14.0 ± 47.3 | .917 |
| T axis, degrees | 35.7 ± 61.6 | 41.1 ± 64.6 | .340 |
| Other, n (%)b | |||
| Left bundle branch block | 38 (10.2) | 21 (11.9) | .531 |
| Right bundle branch block | 70 (18.7) | 46 (26.1) | .047 |
| Ischemia | 70 (19.8) | 30 (24.5) | .223 |
| Infarct | 112 (32.0) | 45 (27.3) | .330 |
a
ECG reports were available for 553/720 subjects;
b
Bonferroni correction for four variables significant p = .0125.