Table 2.
Echocardiographic characteristics of the study population according to new-onset postoperative atrial fibrillation occurrence
| Variable | No POAF (n=132) (%) | POAF (n=91) (%) | OR | 95% CI | P |
|---|---|---|---|---|---|
| Left ventricular mass (g) | 272±101 | 294±115 | 1.00 | 1.00-1.00 | 0.147 |
| Left ventricular mass index (g/m2) | 135±45 | 142±52 | 1.00 | 1.00-1.01 | 0.269 |
| Left atrial volume (cc) | 85±28 | 97±41 | 1.01 | 1.00-1.02 | 0.018 |
| E wave velocity (m/s) | 0.871±0.29 | 0.886±0.37 | 1.15 | 0.50-2.61 | 0.746 |
| A wave velocity (m/s) | 0.808±0.29 | 0.867±0.28 | 2.08 | 0.79-5.41 | 0.136 |
| E/A ratio | 1.18±0.53 | 1.11±0.624 | 0.78 | 0.47-1.28 | 0.325 |
| Deceleration time (ms) | 230±57 | 235±61 | 1.02a | 0.97-1.06 | 0.532 |
| e’ medial (m/s) | 0.065±0.06 | 0.054±0.02 | 0.23b | 0.06-0.88 | 0.032 |
| e’ lateral (m/s) | 0.073±0.03 | 0.069±0.03 | 0.51b | 0.16-1.59 | 0.244 |
| E/e’ medial | 15.8±7.3 | 18.0±9.1 | 1.03 | 1.00-1.07 | 0.049 |
| E/e’ lateral | 13.0±6.3 | 13.6±6.6 | 1.01 | 0.97-1.06 | 0.528 |
| Diastolic grade I (impaired relaxation)c | 46 (34.8) | 42 (46.2) | 2.57 | 1.15-5.76 | 0.021 |
| Diastolic grade II (pseudonormal)c | 46 (34.8) | 32 (35.2) | 1.96 | 0.86-4.46 | 0.109 |
| Diastolic grade III (restrictive)c | 9 (6.8) | 6 (6.6) | 1.88 | 0.54-6.50 | 0.319 |
| Any abnormal diastolic gradec | 101 (76.5) | 80 (87.9) | 2.23 | 1.06-4.72 | 0.035 |
POAF: Postoperative atrial fibrillation, CI: Confidence interval, OR: Odds ratio. aOR determined per 10 ms, bOR determined per 0.1 m/s, cOR as compared to normal diastolic function