Table 4.
Spearman's rho correlation between ΔLV SF and increase of paced vs intrinsic QRS duration.
| Mean ΔLV SF (%) | Mean ΔQRS (ms) | ρ | p | |
| Overall | -0.01 ± 0.12 | 65.9 ± 25.6 | -0.175 | NS |
| ICAVB | -0.02 ± 0.1 | 71.4 ± 21.6 | -0.006 | NS |
| CCHD | -0.04 ± 0.12 | 54.2 ± 30.2 | -0.08 | NS |
| ISHD | 0.01 ± 0.15 | 65 ± 26 | -0.349 | NS |
ΔLV SF – change of left ventricular shortening fraction
ΔQRS – change of paced QRS duration after pacemaker implantation vs intrinsic
QRS duration before pacemaker implantation
CCHD – patients with complex congenital heart disease
ICAVB – patients with isolated congenital complete or advanced AV block
ISHD – patients with isolated structural heart disease
NS – not significant