Ventricular arrhythmias are an important cause of morbidity and mortality and come in a variety of forms, from single premature ventricular complexes to sustained ventricular tachycardia and fibrillation. Rapid developments have taken place over the past decade in our understanding of these arrhythmias and in our ability to diagnose and treat them. The field of catheter ablation has progressed with the development of new methods and tools, and with the publication of large clinical trials ¹. A 48-year-old male with complex congenital heart disease (CCHD) and reduced LVEF, with the presence of frequent ventricular extrasystoles (VE) from the right ventricular outflow tract (RVOT), which is why he was taken to radiofrequency catheter ablation. The aim of the authors is to describe the technique of ablation of VE of the RV outflow tract in complex congenital heart disease.