[Catheter ablation of ventricular tachycardia]

Since the last decade important advances in diagnostics, understanding and the ablation techniques of ventricular tachycardia (VT) have been made. Both, patients with idiopathic VT and patients with structural heart disease and scar-related VT undergo VT ablation, that targets the underlying substrate responsible for VT development. Use of 3-dimensional electro-anatomic mapping systems enables identification of scar-related slow conduction sites, that are the critical players in scar-related VT. Successful mapping and ablation of mono- and polymorphic VT and ventricular fibrillation is achieved at specialized centers and is associated with reduced hospitalizations and mortality in patients with recurrent ICD shocks. This article describes the mechanisms of VTs, current mapping and ablation techniques and the results and complications of VT ablation at experienced VT ablation centers.