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VT arising from sub‐aortic muscular outflow tract structures: In two patients with ventricular septal defects
Author(s) -
Chang Shu,
Marzec Lucas,
Kay Joseph,
Khanna Amber,
Sauer William H.,
Nguyen Duy T.
Publication year - 2019
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/pace.13688
Subject(s) - medicine , ventricular outflow tract , cardiology , intracardiac injection , ablation , ventricular tachycardia , outflow , tachycardia , meteorology , physics
Abstract Background Outflow tract ventricular tachycardias (OTVT) most commonly occur in the absence of structural abnormalities. We present two cases in which a structural variant in the outflow tract was critical to the OTVT. Cases Subaortic muscular bands were identified using intracardiac echocardiography (ICE) in each of our cases with history of VSD and VT. Mapping demonstrating their critical involvement to the tachycardia and ablation along the muscular bands rendered the ventricular tachycardias non‐inducible. Conclusion In rare instances, a structural variant may be involved in OTVTs. The use of ICE along with electroanatomic mapping can assist in successful ablation of these ventricular tachycardias.