Ablation from right coronary cusp.Left panel: 12-lead surface electrocardiogram (ECG) of the premature ventricular contraction (PVC) originating from the right coronary cusp, along with signals originating from the right ventricle (RV) and ablation (ABL) catheters. The PVC signal on the distal ablation catheter is very early (50 ms) when compared to the surface ECG. On the right panel the ablation catheter is clearly visualized under ICE in direct contact with the right cusp (retrograde aortic approach), confirming the origin of the PVC at that location. NCC (non coronary cusp).