A B S T R A C TUsing Electrocardiographic criteria is usual for determining the best site for ablating accessory pathways. Many algorithms are present in this regard, but there are still many facts to be found. The present study aimed to reduce fluoroscopic time by using a special electrocardiographic sign. This study was performed on a young lady with palpitation, negative delta wave in V1 and V3, and positive delta wave in V2. Positive delta in V2 intervened with negative delta in V1 and V3 localized in the crux area for accessory pathway. This might help reduce the procedure time and increase the success rate. This exceptional electrocardiography could be used to locate the site of ablation, increase the rate of success, and reduce radiation exposure.