Arrhythmogenic right ventricular dysplasia is a rare but important cause of ventricular tachycardia in young patioents, which is of a left bundle branch block configuration, The common abnormality on routine ECG is inverted T-waves on precordial leads and magnetic resonance image shows the fatty replacement and/or extreme thinning of the myocardium of right ventricle. Histologically, this disease is characterized by patch replacement of right ventricular myocardium by adipose and fibrous tissue.