The incidence of drug refractory ventricular tachycardia recurrences in patients with dilated cardiomyopathy can be significantly reduced by radiofrequency catheter ablation. The recent introduction of three-dimensional electroanatomical mapping systems improved the success rate and extended the indication to patients with unstable and/or multiple ventricular tachycardias. The present article summarizes the indications, the mapping techniques and the most recent results of catheter ablation of ventricular tachycardias in the setting of dilated cardiomyopathy.