Table 3.
Clinical outcomes in patients with different LVEF.
| patients with LVEF＜50% (n = 9) | patients with LVEF ≥ 50% (n = 15) | P value | |
|---|---|---|---|
| age | 61.11 ± 11.71 | 68.60 + 6.44 | 0.06 |
| Male (n, %) | 4 (44.4%) | 12 (80%) | 0.09 |
| initial NYHA classification | 2.67 ± 0.5 | 1.73 ± 1.43 | 0.075 |
| final NYHA classification | 1.38 ± 1.02* | 1.56 ± 0.92 | 0.432 |
| initial QRSd (ms) | 133.56 ± 49.15 | 116.67 ± 45.97 | 0.182 |
| final QRSd (ms) | 120.22 ± 22.01 | 121.6 ± 23.02 | 0.949 |
| initial LA size (mm) | 50.33 ± 8.93 | 49.13 ± 9.31 | 0.759 |
| final LA size (mm) | 46.11 ± 5.97* | 47 ± 11.75 | 0.979 |
| △LAD (mm） | −4.22 ± 2.53 | −2.13 ± 2.88 | 0.670 |
| initial LVEDD (mm) | 52.11 ± 10.10 | 47.53 ± 4.64 | 0.142 |
| final LVEDD (mm) | 48.33 ± 9.07* | 46.07 ± 6.56 | 0.195 |
| △LVEDD(mm） | −3.78 ± 2.16 | −1.46 ± 1.67 | 0.881 |
| initial LVEF (%) | 39.22 ± 7.51 | 52.13 ± 1.84 | ＜0.001 |
| final LVEF (%) | 45.22 ± 9.59* | 53.00 ± 3.80 | ＜0.001 |
| △LVEF(%） | 6.01 ± 3.60 | 0.87 ± 0.76 | 0.038 |
| pacing percentage (%) | 90.44 ± 20.82 | 81.64 ± 23.24 | 0.326 |
NYHA, New York Heart Association; LAD, left atrium diameter; LVEDD, left ventricular end-diastolic diameter; LVEF, left ventricular ejection fraction; *P < 0.05 significant difference before and after follow-up.