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Endocardial Mapping of Right Ventricular Outflow Tract Tachycardia Using Noncontact Activation Mapping by Michael Ribbing; Kristina Wasmer; Gerold Mönnig; Paulus Kirchhof; Peter Loh; Günter Breithardt; Wilhelm Haverkamp; Lars Eckardt is a Medicine article available to read on EtoBox.
What is Endocardial Mapping of Right Ventricular Outflow Tract Tachycardia Using Noncontact Activation Mapping about?
**__Introduction:__ Activation mapping and pace mapping identify successful ablation sites for catheter ablation of right ventricular outflow tract (RVOT) tachycardia. These methods are limited in patients with nonsustained tachycardia or isolated ventricular ectopic beats. We investigated the feasibility of using noncontact mapping to guide the ablation of RVOT arrhythmias.** **__Methods and Results:__ Nine patients with RVOT tachycardia and three patients with ectopic beats were studied using noncontact mapping. A multielectrode array catheter was introduced into the RVOT and tachycardia was analyzed using a virtual geometry. The earliest endocardial activation estimated by virtual electrograms was displayed on an isopotential color map and measured** **33 ± 13 msec** **before onset of QRS. Virtual unipolar electrograms at this site demonstrated QS morphology. Guided by a locator signal, ablation was performed with a mean of** **6.9 ± 2.2** **radiofrequency deliveries. Acute success was achieved in all patients. During follow‐up, one patient had a recurrence of RVOT tachycardia. Compared with patients** **(n = 21)** **who underwent catheter ablation using a conventional approach,
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- Author
- Michael Ribbing; Kristina Wasmer; Gerold Mönnig; Paulus Kirchhof; Peter Loh; Günter Breithardt; Wilhelm Haverkamp; Lars Eckardt
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Futura Publishing Company, Inc; Blackwell Publishing Inc.; Wiley (ISSN 1540-8167)
- Published
- 2003
- Language
- EN
- Field
- Medicine (Health Sciences)