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Identification of an epicardial slow conduction channel using ripple mapping in ablation of postinfarct ventricular tachycardia
Author(s) -
Takamiya Tomomasa,
Inaba Osamu,
Nitta Junichi,
Goya Masahiko
Publication year - 2019
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/jce.13955
Subject(s) - medicine , cardiology , ablation , ventricular tachycardia , catheter ablation , sinus rhythm , myocardial infarction , qrs complex , tachycardia , atrial fibrillation
An 82‐year‐old man underwent redo catheter ablation of ventricular tachycardia (VT) after anterior infarction. A ripple mapping conducting channel (RMCC) was identified within the anterior scar in the left ventricular epicardium during sinus rhythm. Along the RMCC, delayed potentials during sinus rhythm, a good pace map with a long stimulus to the QRS interval, and mid‐diastolic potentials during VT were recorded, and epicardial ablation at this site eliminated the VT. These findings suggested that the RMCC in the epicardial scar served as a critical isthmus of the postinfarct VT, and ablation targeting the RMCC was effective.