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Preserved cardiac synchrony and function with single-site left ventricular epicardial pacing during mid-term follow-up in paediatric patients
Europace, 07/06/09

Tomaske M et al. – Conventional and 2D strain (2Ds) echocardiographic measurements indicate preserved LV (LV) synchrony and function in pediatric pts with LV pacing (LVP) vs right ventricular pacing (RVP). Permanent LVP has no impact on RV synchrony.

Methods

Study of ventricular synchrony and function with permanent LVP vs RVP in pediatric pts with normal cardiac anatomy
Assessment of 25 pediatric pts with normal cardiac anatomy and single-site epicardial
RV apex pacing or LV free wall pacing for complete heart block
RVP pts: 10, pacing duration: 7.9 ± 2.9 yrs
LVP pts: 15, pacing duration: 4.3 ± 2.6 yrs
Controls: 15 healthy children
Conventional echocardiography, myocardial circumferential (LV), and longitudinal (RV) 2Ds analysis

Results

Paced QRS duration did not differ between groups
Interventricular mechanical delay, septal-to-posterior wall motion delay, septal-to-lateral wall motion delay, and LV mechanical delay preserved for LVP but not for RVP
RV mechanical delay similar among paced groups
LV ejection fraction normal for LVP but not for RVP
LV pacing did not differ from controls for synchrony or function

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