Extensive Preferential Pathway Ablation for the Elimination of Premature Ventricular Contractions Arising from the Right Ventricular Outflow Tract

A 76 y/o women presented with 2 different types of premature ventricular contractions (VPCs 1 and 2) arising from the right ventricular outflow tract (RVOT). Catheter ablation (CA) eliminated PVC1 at the earliest activation site (EAS), but thereafter another PVC morphology (PVC3) appeared. Small pot...

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Bibliographic Details
Published in:Indian pacing and electrophysiology journal 2013-03, Vol.13 (2), p.88-93
Main Authors: Morita, Norishige, Iida, Takayuki, Akira, Ueno, Kobayashi, Yoshinori
Format: Article
Language:English
Subjects:
Ablation
Case Report
Pre-potential
Preferential pathway
Premature ventricular contraction
Right Ventricular outflow tract
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Summary:A 76 y/o women presented with 2 different types of premature ventricular contractions (VPCs 1 and 2) arising from the right ventricular outflow tract (RVOT). Catheter ablation (CA) eliminated PVC1 at the earliest activation site (EAS), but thereafter another PVC morphology (PVC3) appeared. Small potentials preceding the local potential were broadly exhibited from the RVOT’s supero-anterior region to the EAS during PVC3. Point CA targeting such prepotentials failed. Transverse-linear CA with a line connecting sites with such pre-potentials eliminated both PVCs 3 and 2. In cases with broadly spreading preferential pathways, extensive CA might be needed to eliminate the PVCs.
ISSN:0972-6292
0972-6292
DOI:10.1016/S0972-6292(16)30610-6