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Radiofrequency Catheter Ablation of Left Ventricular Outflow Tract Tachycardia from the Coronary Cusp: A New Approach to the Tachycardia Focus
Author(s) -
SHIMOIKE EIMEI,
OHNISHI YASUSHI,
UEDA NORIHIRO,
MARUYAMA TORU,
KAJI YOSHIKAZU
Publication year - 1999
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/j.1540-8167.1999.tb01271.x
Subject(s) - medicine , cardiology , ventricular outflow tract , tachycardia , catheter ablation , left bundle branch block , radiofrequency ablation , ventricular tachycardia , ablation , right bundle branch block , coronary sinus , radiofrequency catheter ablation , qrs complex , electrocardiography , heart failure
Transcoronary Cusp Ablation of VT.Introduction: Idiopathic ventricular tachycardia (VT) originating from the left ventricular outflow tract (LVOT) is rare. Previously reported were two cases of LVOT tachycardia which were treated with radiofrequency (RF) catheter ablation through endocardial aortomitral continuity. We report here a case of a repetitive LVOT tachycardia in which the QRS morphology during VT exhibited an atypical left bundle branch block and inferior axis. Pace mapping revealed that the origin of this VT was very close to the left sinus of Valsalva. Transcoronary cusp RF catheter ablation abolished the VT in this patient and is a new approach for the treatment of this kind of VT. The application of this approach to the other types of VT has yet to he determined.