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Europace 2005 7(5):428-432; doi:10.1016/j.eupc.2005.03.011
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© 2005 The European Society of Cardiology. Published by Elsevier Ltd. All rights reserved.

SHORT SERIES REPORT

Coronary sinus mapping to differentiate left versus right ventricular outflow tract tachycardias

Arash Arya*, Majid Haghjoo, Zahra Emkanjoo and Mohammad Ali Sadr-Ameli

Department of Pacemaker and Electrophysiology, Rajaie Cardiovascular Medical Center Mellat Park, Vali-Asr Avenue, Tehran 1996911151, Iran

Abstract

Outflow tract ventricular tachycardia (OT-VT) can originate from several different segments of the outflow tract. Various ECG criteria have been proposed for localization of OT-VTs. We present two patients, one with left and one with right OT-VT. We used local ventricular electrograms in the coronary sinus to localize the focus of the OT-VT. Mapping of local ventricular electrograms in the coronary sinus may be a simple and effective method for differentiating right versus left ventricular outflow tract tachycardias. However, the diagnostic value and precision of this method should be evaluated in a series of patients before its implementation in the OT-VT ablation decision algorithm.

Key Words: ventricular tachycardia, catheter ablation, coronary sinus, mapping

*Corresponding author. Tel.: +98 912 126 1467; fax: +98 21 878 4618. E-mail address: arya{at}rhc.ac.ir (A. Arya)


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