Preferential conduction travelling from the left coronary cusp to the right ventricular outflow tract via the right coronary cusp of the aorta.

This report describes a case of premature ventricular contractions with the preferential pathway traveling from the left coronary cusp (LCC) to the right ventricular outflow tract (RVOT) via the right coronary cusp (RCC). The earliest activation was recorded within the LCC, while the successful ablation site was the RCC, where the second earliest prepotential was recorded. The remediable ablation site for ventricular arrhythmias (VAs) arising from the left ventricular (LV) ostium may not necessarily be the site of the earliest activation, but may be the site with the potential representing the preferential pathway.