Key result
Right ventricular outflow tract pacing sites showed significant differences in QRS axis (P<0.05) and morphology, but considerable overlap prevented defining clear ECG cut-offs.
Why the study?
Do electrocardiographic parameters differ among specific pacing sites within the right ventricular outflow tract?
Population
143 patients who underwent pacemaker implantation with a ventricular lead in the right ventricular outflow…
Comparison
Right ventricular outflow tract (RVOT) pacing vs Comparison among specific RVOT pacing sites
Design
Cross-sectional
Authors
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ECG overlap limits reliable RVOT site localization by surface ECG; hypothesis-generating and leaves open need for imaging validation.
Observational (n=143)
Do electrocardiographic parameters differ among specific pacing sites within the right ventricular outflow tract?
p-value: p=<0.05
Although ECG parameters like QRS axis differ significantly depending on the specific RVOT pacing site, considerable overlap prevents using surface ECG to reliably identify the exact pacing location.
Balt et al. (2010) conducted an observational in Pacemaker implantation (n=143). Right ventricular outflow tract (RVOT) pacing vs. Different RVOT pacing sites (anterior, septal, free wall) was evaluated on QRS axis (p=<0.05). Right ventricular outflow tract pacing sites showed significant differences in QRS axis (P<0.05) and morphology, but considerable overlap prevented defining clear ECG cut-offs.
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