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Non-contact mapping and ablation of tachycardia originating in the right ventricular outflow tract

Published online by Cambridge University Press:  15 August 2006

Thomas Paul ,
Andrew T. D. Blaufox  and
J. Philip Saul
Thomas Paul
Affiliation:
The Children's Heart Program of South Carolina, Medical University of South Carolina, Charleston, SC, USA
Andrew T. D. Blaufox
Affiliation:
The Children's Heart Program of South Carolina, Medical University of South Carolina, Charleston, SC, USA
J. Philip Saul
Affiliation:
The Children's Heart Program of South Carolina, Medical University of South Carolina, Charleston, SC, USA
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Abstract

We performed an electrophysiological study, using non-contact mapping, in an 8-year-old girl weighing 39.9 kg who had suffered recurrent symptomatic episodes of exercise-induced non-sustained ventricular tachycardia. Color-coded isopotential maps of the ventricular tachycardia identified the area of earliest endocardial activation high and anterior in the right ventricular outflow tract. Although partial deflation of the balloon was required to position the ablation catheter at the earliest site of activation, this site was still identified accurately, as demonstrated by termination of the ventricular tachycardia and ectopy upon mechanical pressure, as well as application of radiofrequency current.

In this young patient, precise mapping of the earliest endocardial activation using the non-contact mapping system was safe and effective, allowing successful radiofrequency ablation of the tachycardia.

Keywords

Idiopathic right ventricular outflow tract tachycardianon-contact mappingradiofrequency catheter ablation
Type
Brief Report
Information
Cardiology in the Young , Volume 12 , Issue 3 , May 2002 , pp. 294 - 297
Copyright
2002 Cambridge University Press

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