Key result
Radiofrequency catheter ablation successfully eliminated sustained ventricular tachycardia originating from the outflow tract septum in a patient with prior surgical repair of double outlet right ventricle.
Case Report (n=1)
No
In patients with repaired double outlet right ventricle, ventricular tachycardia originating from the intramural outflow tract septum may present with right ventricular breakout but require ablation from the left side.
Answers are grounded in this paper and cite their sources.
May warrant considering left-sided ablation for septal VT after DORV repair; leaves open generalizability beyond this single case.
A 12-year-old boy born with double outlet right ventricle (RV) developed sustained ventricular tachycardia (VT) 6 years after the corrective surgery and underwent electrophysiologic testing and catheter ablation. Electroanatomic mapping of the right and left ventricles during the VT revealed a centrifugal activation from the outflow tract septum. Though an excellent pace map was obtained in the RV, successful ablation was achieved on the left side. These findings suggested that the VT origin might have been located in the intramural region of the ventricular outflow tract septum with a preferential breakout site in the RV outflow tract.
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Yamada et al. (2008) conducted a case report in Ventricular tachycardia after repair of double outlet right ventricle (n=1). Radiofrequency catheter ablation was evaluated on Termination and non-inducibility of ventricular tachycardia. Radiofrequency catheter ablation successfully eliminated sustained ventricular tachycardia originating from the outflow tract septum in a patient with prior surgical repair of double outlet right ventricle.
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