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Table 4 Spearman's rho correlation between ΔLV SF and increase of paced vs intrinsic QRS duration.

From: Mid-term echocardiographic follow up of left ventricular function with permanent right ventricular pacing in pediatric patients with and without structural heart disease

  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
  1. ΔLV SF – change of left ventricular shortening fraction
  2. ΔQRS – change of paced QRS duration after pacemaker implantation vs intrinsic
  3. QRS duration before pacemaker implantation
  4. CCHD – patients with complex congenital heart disease
  5. ICAVB – patients with isolated congenital complete or advanced AV block
  6. ISHD – patients with isolated structural heart disease
  7. NS – not significant