Electrocardiographic features of septal location of right ventricular outflow tract tachycardia

Radiofrequency catheter ablation has transformed management of patients 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 attention has now turned to its use in ventricular arrhythmias.(1) While the majority of clinically important ventricular arrhythmias are attributable to myocardial ischemia or infarction, a small group of patients without structural heart disease develop focal Ventricular tachycardia (VT) arising from the right ventricular outflow tract (RVOT).(2,3) We report the clinical presentation, diagnostic features, localization technique, and radiofrequency ablation of idiopathic RVOT tachycardia in 10 patients.