Spontaneous right ventricular outflow tract tachycardia in a patient with Brugada syndrome

We report the case of a 28-year-old man with no structural heart disease, w ho exhibited clearly augmented ST segment elevation in the sight precordial leads, followed by induction of spontaneous right ventricular outflow trac t tachycardia with intravenous administration of Class IA antiarrhythmic dr ugs. The electrophysiologic mechanism of this tachycardia was thought to be triggered activity due to delayed afterdepolarizations. Due to the existen ce of substrates that were similar to Brugada syndrome combined with right ventricular outflow tract tachycardia, this case may represent a subtype of Brugada syndrome.