A Case of Premature Ventricular Complexes from the Proximal Left Bundle Branch Successfully Ablated from the Right Coronary Cusp

Background: Premature ventricular complexes (PVCs) from the proximal left bundle branch (LBB) can be ablated inthe left ventricular outflow tract but can easily damage normal conduction bundles. Here, we report a case of successfulablation of PVCs from the proximal LBB within the right coronary cusp (RCC).Case presentation: Our patient was a 70-year-old woman with PVCs from the proximal LBB that were successfully ablated via the RCC through radiofrequency catheter ablation with a 3D mapping system; she had a complication of incomplete right bundle branch block (RBBB) and remained asymptomatic during follow-up.Conclusion: The RCC provides an alternative approach for ablating PVCs originating from the proximal LBB, owing to the close relationship between the RCC and proximal LBB.