Limitations
The present study has several limitations. First, we used the location of successful RFCA at the RVOT or LVOT as the PVC/VT site of origin. It is possible that PVCs/VTs with an LVOT origin could be abolished from the RVOT. Second, a study recently reported about preferential conduction across the ventricular outflow septum[19]. The presence of preferential conduction decreases the reliability of the accuracy of determining VA origin. Third, extremely rare VAs may have multiple exits, and during ablation, their exit pathways may change; therefore, an altered ablation target may be needed. Lastly, to increase the reliability of the algorithm, further prospective studies with a larger sample size are warranted.