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Updated: Jun 6, 2026

Robotic Ablation of Atrial Fibrillation
Published on: May 29, 2015
Idiopathic mitral annular PVCs with multiple breakouts and preferential conduction unmasked by radiofrequency
Takumi Yamada1, Harish Doppalapudi, H Thomas McElderry
1Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama 35294–0019, USA.
Abstract:
A 39-year-old man with idiopathic monomorphic premature ventricular contractions (PVCs), exhibiting a right bundle branch block and inferior axis QRS morphology, underwent electrophysiological testing. After a radiofrequency (RF) application to the anterior mitral annulus (MA) eliminated the spontaneous PVC morphology, a second PVC morphology occurred. Pacing from the first ablation site exhibited an excellent match to the second PVCs with a long stimulus to QRS interval. An RF application delivered near the first lesion eliminated all PVCs. The MA PVCs in this case exhibited a single origin with multiple breakouts and preferential conduction that were unmasked by RF ablation.
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