ELECTROPHYSIOLOGY
Monomorphic ventricular tachycardia related to WolffParkinsonWhite surgery
Department of Cardiology, The Royal Melbourne Hospital, Grattan Street, Parkville, Melbourne 3052, Australia
Monomorphic ventricular tachycardia (MVT) is well described in patients who have had a ventricular scar due to repair of congenital heart disease. A 54-year-old woman presented with MVT 20 years after WPW surgery for a left-sided accessory pathway. The circuit was mapped to an area at the base of the left ventricle consistent with the incision described in the operation report. Entrainment confirmed the re-entrant circuit. Successful radiofrequency ablation was performed in a zone of slowed conduction consistent with the circuit isthmus. Any iatrogenic ventricular scar may form the substrate for MVT and be treated with standard electrophysiology techniques.
Key Words: Electrophysiology-clinical, Ablation, WolffParkinsonWhite syndrome, Ventricular tachycardia
* Corresponding author. Tel: +613 93428879; fax: +613 93472808 E-mail address: richard.hillock{at}mh.org.au