Table 2.
Baseline characteristics of patients with concordant and discordant LV lead positions. Data are presented as means±standard deviation or as numbers (%)
| Baseline characteristics | Concordant LV lead position (n = 52) | Discordant LV lead position (n = 38) | p value |
|---|---|---|---|
| Age (years) | 68±10 | 66±11 | 0.5 |
| Male gender | 37 (71%) | 28 (74%) | 0.8 |
| Ischaemic heart failure | 38 (73%) | 24 (63%) | 0.4 |
| NYHA functional class | 3.0±0.4 | 3.0±0.4 | 1.0 |
| QRS duration (ms) | 168±35 | 153±33 | 0.1 |
| LVEDV (ml) | 214±67 | 213±62 | 1.0 |
| LVESV (ml) | 160±57 | 161±57 | 0.9 |
| LVEF (%) | 27±8 | 26±8 | 0.7 |
| Mitral regurgitation (moderate/severe) | 19 (37%) | 19 (50%) | 0.2 |
| Histogram bandwidth (°) | 126±67 | 157±86 | 0.1 |
| Phase SD (°) | 38±20 | 45±21 | 0.1 |
| Perfusion defect LV pacing region | 7 (13%) | 10 (26%) | 0.2 |
| Extent of perfusion defect (%) | 23±14 | 29±18 | 0.1 |
| CRT response after 6 months | 41 (79%) | 10 (26%) | <0.01 |