NYHA Change in Cardiac Functional Parameters Compared with Improvement in a Number of NYHA Classes Before and After 6 Months of CRT
| Change in parameter (after – before) | No change in NYHA (n = 19) | Improved by 1 NYHA class (n = 34) | Improved by 2 NYHA classes (n = 13) | P |
| QRS | 9.44 ± 25.03 ms | −6.83 ± 31.13 ms | −28.77 ± 36.96 ms | 0.01 |
| LVEF (echo) | 1.99% ± 10.61% | 8.71% ± 13.01% | 13.63% ± 15.20% | 0.03 |
| LVEDVI | −5.94 ± 32.75 mL | −6.94 ± 36.37 mL | −21.25 ± 22.46 mL | 0.5 |
| LVESVI | −15.46 ± 23.81 mL | −10.75 ± 35.17 mL | −23.17 ± 21.61 mL | 0.5 |
| LVS | −0.004 ± 0.04 | 0.024 ± 0.06 | 0.12 ± 0.15 | 0.03 |
| LVE | 0.004 ± 0.08 | −0.04 ± 0.08 | −0.12 ± 0.12 | 0.005 |
| LVSDØ | −3.5° ± 11.60° | −11.2° ± 13.00° | −22.2° ± 20.90° | 0.02 |
| LVEF (ERNA) | 1.13% ± 6.10% | 5.2% ± 6.90% | 15.2% ± 9.20% | 0.0001 |
| RVSDØ | −0.89° ± 13.30° | −1.5° ± 6.80° | −0.7° ± 14.10° | 0.07 |
| RVS | 0.006 ± 0.04 | 0.008 ± 0.04 | 0.006 ± 0.08 | 0.8 |
| RVE | −0.004 ± 0.12 | −0.011 ± 0.06 | −0.13 ± 0.14 | 0.80 |
| IVS | 2.33° ± 7.60° | −3.6° ± 16.20° | −4.2° ± 21.60° | 0.3 |