Table II.
Clinical outcomes and echocardiographic parameters after CRT implantation
| Parameter | Directly after implantation (n = 57) | 3 months follow-up (n = 57) | Value of p |
|---|---|---|---|
| NYHA | 3.11 ±0.28 | 2.25 ±0.68 | < 0.001 |
| 6-MWT [m] | 298.04 ±107.42 | 373.12 ±127.15 | < 0.001 |
| QRS [ms] | 184.23 ±28.31 | 152.70 ±19.11 | < 0.001 |
| LVEDd [mm] | 73.33 ±8.94 | 71.54 ±9.87 | 0.005 |
| LVESd [mm] | 62.40 ±10.03 | 60.60 ±11.29 | 0.081 |
| LVEF (%) | 21.70 ±4.81 | 26.05 ±4.86 | < 0.001 |
| LVEDV [ml] | 244.30 ±83.79 | 226.42 ±88.61 | < 0.001 |
| LVESV [ml] | 192.79 ±71.95 | 168.67 ±76.48 | < 0.001 |
| RA minor dimension [mm] | 37.67 ±7.39 | 36.42 ±6.18 | 0.116 |
| RA major dimension [mm] | 49.79 ±10.53 | 48.33 ±9.47 | 0.040 |
| RA end-systolic area [cm2] | 17.49 ±6.30 | 17.06 ±5.91 | 0.155 |
| RV wall thickness [mm] | 5.47 ±1.20 | 5.12 ±1.02 | 0.028 |
| RV longitudinal dimension [mm] | 25.35 ±7.02 | 25.84 ±6.37 | 0.342 |
| RV basal dimension [mm] | 28.74 ±4.47 | 28.32 ±4.24 | 0.266 |
| RV mid cavity dimension [mm] | 24.21 ±4.85 | 23.75 ±5.20 | 0.160 |
| RV end-diastolic area [cm2] | 15.72 ±5.20 | 15.62 ±5.45 | 0.927 |
| RV end-systolic area [cm2] | 10.94 ±4.51 | 10.22 ±4.25 | 0.007 |
| RV fractional area change (%) | 31.35 ±10.32 | 35.40 ±10.51 | < 0.001 |
| TAPSE [mm] | 13.95 ±2.80 | 15.79 ±2.33 | < 0.001 |
| S’ [cm/s] | 8.84 ±3.45 | 11.00 ±3.43 | < 0.001 |
RA – right atrium, RV – right ventricle, TAPSE – tricuspid annular plane systolic excursion, S’ – peak systolic annular velocity, E’ – peak early diastolic annular velocity, A’ – peak late diastolic annular velocity, TR – tricuspid regurgitation, TR%RA – percentage of right atrium area covered by regurgitation jet, RVSP – right ventricle systolic pressure. *Only in patients with sinus rhythm.