Radiofrequency Catheter Ablation of Idiopathic Ventricular Tachycardia Originating in the Main Stem of the Pulmonary Artery
Address for correspondence: Carl Timmermans, M.D., Department of Cardiology, Academic Hospital Maastricht, Maastricht, CARIM (Cardiovascular Research Institute Maastricht), P. Debeyelaan 25, P.O. Box 5800, Maastricht, TheNetherlands.Fax:31-43-3875104;E-mail: [email protected].
Abstract
Idiopathic Pulmonary Artery Ventricular Tachycardia. We report the case of a patient in whom successful radiofrequency catheter ablation of an idiopathic ventricular tachycardia (VT) originating in the main stem of the pulmonary artery was performed. After successful ablation of the index arrhythmia, which was an idiopathic right ventricular outflow tract VT, a second VT with a different QRS morphology was reproducibly induced. Mapping of the second VT revealed the presence of myocardium approximately 2 cm above the pulmonary valve. Application of radiofrequency energy at this site resulted in termination and noninducibility of this VT. After 6-month follow-up, the patient remained free from VT recurrences.
