Mechanism of ventricular tachycardia in a patient with double-outlet left ventricle
Karim Benali1,2, Nefissa Hammache2,3, Charles Guenancia2,4
1Department of Cardiology, Saint-Etienne University Hospital, Saint-Priest-En-Jarez, France.
Abstract:
We report the case of ventricular tachycardia (VT) ablation procedure in a patient with history of surgically repaired double-outlet left ventricle. The electrophysiology procedure revealed a re-entry pattern between the right-ventricle to main-pulmonary-artery conduit and the tricuspid annulus. The re-entrant mechanism was most likely promoted by a fibrous remodeling of this area, related to the surgical repair. This case is the first to describe a re-entry mechanism between fixed anatomical barriers in a repaired right ventricle of a double-outlet left ventricle. A pace mapping technique was used to highlight the VT isthmus.
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