Mechanism of ventricular tachycardia in a patient with double-outlet left ventricle

J Cardiovasc Electrophysiol. 2021 Nov;32(11):3099-3102. doi: 10.1111/jce.15232. Epub 2021 Sep 8.

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.

Keywords: catheter ablation; double-outlet left ventricle; pace-mapping; slow conduction; ventricular tachycardia.

Publication types

  • Case Reports

MeSH terms

  • Catheter Ablation*
  • Electrocardiography
  • Heart Ventricles / diagnostic imaging
  • Heart Ventricles / surgery
  • Humans
  • Tachycardia, Ventricular* / diagnostic imaging
  • Tachycardia, Ventricular* / etiology
  • Transposition of Great Vessels*