Radiofrequency catheter ablation is a well-established technique in the therapy of many forms of supraventricular tachyarrhythmias. Its usage in ventricular arrhythmias is little known. This is a report of its first usage in Hawaii in the treatment of 2 specific forms of ventricular tachycardia in 5 patients without structural heart disease. A cure was achieved in 4 of the 5 patients.