ELECTROCARDIOGRAPHIC FEATURES OF SEPTAL LOCATION OF RIGHT-VENTRICULAROUTFLOW TRACT TACHYCARDIA

Radiofrequency catheter ablation has transformed management of patient s with cardiac arrhythmias, providing arrhythmia cure at low risk for large numbers of patients who would otherwise have been maintained on long-term antiarrhythmic drug therapy. The technique is established as the treatment of choice in many supraventricular arrhythmias and atte ntion has now turned to its use in ventricular arrhythmias.(1) While t he majority of clinically important ventricular arrhythmias are attrib utable to myocardial ischemia or infarction, a small group of patients without structural heart disease develop focal Ventricular tachycardi a (VT) arising from the right ventricular outflow tract (RVOT).(2,3) W e report the clinical presentation, diagnostic features, localization technique, and radiofrequency ablation of idiopathic RVOT tachycardia in 10 patients.