Panel A shows a 12-lead ECG of slow VT in a patient with non-ischaemic cardiomyopathy. Panel B shows an activation map during VT originating from RV inferoseptal processus. Despite extensive ablation, including the epicardial approach, VT recurred. During the re-ablation session, VT was successfully abolished by a conventional 4 mm irrigated-tip catheter inserted under the inferior leaflet of the tricuspid valve. Due to the larger size of the lattice tip, the catheter likely did not fit into the narrow space under the tricuspid valve, which could be then successfully cannulated and ablated with a 4 mm-tip catheter. Panels C and D show intracardiac echocardiography images with the position of the lattice-tip and 4 mm-tip close to the tricuspid annulus from the corresponding ablation sessions.